日韩亚洲一区中文字幕,日韩欧美三级中文字幕在线,国产伦精品一区二区三区,免费在线欧美性爱链接

      1. <sub id="o5kww"></sub>
        
<legend id="o5kww"></legend>
        <style id="o5kww"><abbr id="o5kww"></abbr></style>
        <strong id="o5kww"><u id="o5kww"></u></strong>
        

        2. 


          
	
          
		
	
          
	
          
		
          
			
		
          
		
          
	
          

          



          

          

          


          


          
	
          
			
          

			
          
				
          What if we could replace oil with a fuel which produced no pollution and which everybody had equal access to?The good news is that we can, In fact, we are swimming in it—literally.
          Hydrogen is one of the building blocks of the universe ,Our own sun is basically ,a big ,dense cloud of the stuff ,And hydrogen can be used to create electricity for power ,heat and light.
          The problem is that hydrogen is everywhere and nowhere at the same time , It does not exist as a material on its own ,but is always part of something else, So it has to be separated before it can be used.
          Most commercial hydrogen in use now is created from natural gas , As oil will start to run out in around the year 2030.,it makes sense to produce as much hydrogen as possible as soon as we can ,But natural gas supplies will also begin to run out soon after, Another source is needed.
          Researchers are now using electricity to make water into hydrogen ,Companies are working on the problem in their own areas ,The first commercial hydrogen ,”fuel cells”for computers and mobile phones have already come on to the market ,Auto companies have also invested over US ＄2billion in the production of hydrogen fuelled cars
          Thd nations of a hydrogen fuelled planet would not fight over evergy recourses, There would be a great reduction in pollution ,The only by-product of creating hydrogen is pure drinking water—something that is very scarce in many parts of the world ,But that is not where the good news ends, Once the costs of producing hydrogen have been brought down ,it will possibly provide power for a third of the Earth ‘s population that has no electricity.
          And electricity creates wealth, In South A frica over the last decade there has been a large programme of electrification, Thanks to the programme , people do not have to spend their days looking firewood to burn for heat, And with electric light , they can work long into the night.
          Some scientists see radical changes in the way the human race co-operates, Hydrogen creates clectricity, and is also created by it. With dual use fuel cells, everyone who consumes energy could also produce it ,Late at night, a man drives home in London and connects his car into the “world-wide hydrogen web”, which it supplies with electricity ,A few hours later, a man in Beijing uses that electricity to power the hydrogen cell in his car, Hydrogen could be the first democratic energy source.
          Like all dreams of the future, it seems very far away, But the threat of war and terrorism in the Middle East has made governments and businesses more aware of the need to edn oil dependency and spend more time and money on hydrogen resource, So maybe the threat of war is not a completely bad thing for the future of the human race.
          小題1:What does the underlined word “it”in the last but one paragraph refer to?
          A．wealthB．hydrogenC．electricityD．fuel
          小題2:What is the problem with using hydrogen as energy?
          A．It has by-products
          B．It has to be separated from other materials
          C．It will make energy too cheap
          D．It is too far away from us
          小題3:Why does the author give the example in the last but one paragraph?
          A．To tell us that we produce energy while using hydrogen power
          B．To tell us that hydrogen power does not produce pollution
          C．To show hydrogen power can stop war
          D．To show hydrogen power is cheap
          小題4:What is the author’s attitude about the future?
          A．skepticalB．negativeC．indifferentD．positive
          小題5:What is the passage mainly about?
          A．war and energy
          B．the future of hydrogen as an energy resource
          C．the disadvantages of oil
          D．How to end war
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				

          小題1:C
          小題2:B
          小題3:A
          小題4:D
          小題5:B

          試題分析：本文主要講述的是為了我們的資源可能會(huì)枯竭，但是我們可以使用新型的hydrogen能源作為我們的主要資源。文章具體描述了分類hydrogen的困難等
          小題1:C 推理題。根據(jù)本句Some scientists see radical changes in the way the human race co-operates, Hydrogen creates electricity, and is also created by it.可知這里的it就是指前一句里的clectricity指這兩種物質(zhì)Hydrogen和electricity是相互依存的。故C正確。
          小題2:B 推理題。根據(jù)文章第三段The problem is that hydrogen is everywhere and nowhere at the same time , It does not exist as a material on its own ,but is always part of something else, So it has to be separated before it can be used.可知最大的問題是hydrogen并不是單獨(dú)存在的，而是和其他的物質(zhì)在一起的。所以要使用hydrogen，首先就是要把hydrogen分離出來(lái)。故B正確。
          小題3:A 推理題。根據(jù)文章倒數(shù)第二段1,2行Some scientists see radical changes in the way the human race co-operates, Hydrogen creates clectricity, and is also created by it. With dual use fuel cells, everyone who consumes energy could also produce it可知舉這個(gè)例子就是為了告訴我們?cè)诜蛛x出hydrogen的時(shí)候，我們也需要消耗電能等其他能源。故A正確。
          小題4:D 推理題。根據(jù)文章最后一段Like all dreams of the future, it seems very far away, But the threat of war and terrorism in the Middle East has made governments and businesses more aware of the need to edn oil dependency and spend more time and money on hydrogen resource可知作者對(duì)于未來(lái)并不是很擔(dān)憂 ，而是有樂觀的觀點(diǎn)。故D正確。
          小題5:.B 主旨大意題。本文主要講述的是為了我們的資源可能會(huì)枯竭，但是我們可以使用新型的hydrogen能源作為我們的主要資源。文章具體描述了分類hydrogen的困難等。故B正確。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
				練習(xí)冊(cè)系列答案
		
          
		
				
			

					
          
				相關(guān)習(xí)題
			
          
						
		
          
			
          
				科目：高中英語(yǔ)
				來(lái)源：不詳
				題型：閱讀理解
			
          

						
          When times get tough, we all look for ways to cut back. When we’re hungry, we eat at home instead of going out. We take buses instead of taxis. And we wear our old designer jeans just a few months longer. With college expenses at all-time highs, high school students are eager to do anything to cut the cost of a university education.
          One cost-cutting proposal is to allow college students to get a bachelor’s degree in three years instead of four. Educational institutions have been actively exploring ways to make the learning process more efficient. But there’s a question: Would the quality of undergraduate(本科生)education suffer? Few US universities have formally approved a “three-year degree” model.
          I doubt that mainstream North American colleges will carry out a three-year curriculum(課程) any time soon. For one thing, most universities already allow highly qualified students to graduate early by testing out of certain classes and obtaining a number of college credits(學(xué)分). In addition, at famous universities, the committee who determine which courses are required and which courses are electives are unlikely to suddenly “throw out” one quarter of the required credits. Professors will resist “diluting(稀釋)” the quality of the education they offer.
          In my opinion, a quality four-year education is always superior to a quality three-year education. A college education requires sufficient time for a student to become skilled in their major and do coursework in fields outside their major. It is not a good idea to water down education, any more than it’s not a good idea to water down medicine. If we want to help students find their way through university, we should help them understand early on what knowledge and skills they need to have upon graduation. We should allow students to test out of as many courses as possible. We should give them a chance to earn money as interns(實(shí)習(xí)生)in meaningful part-time jobs that relate to their university studies, such as the five-year co-op program at Northeastern University. 
          小題1:The first paragraph serves as a(n)________．
          A．explanationB．definitionC．introductionD．comment
          小題2:We can learn from the passage that ________.
          A．most American universities are against the “three-year degree” model
          B．many famous US universities are considering adopting the “three-year degree” model
          C．professors are willing to accept the “three-year degree” model
          D．the “three-year degree” model can make college learning more efficient
          小題3:In most US universities，________.
          A．college students are offered the co-op program
          B．electives’ credits make up one quarter of the required credits
          C．a(chǎn)ll students are required to finish four-year education before graduation
          D．some excellent students can graduate ahead of time
          小題4:We can infer that________.
          A．the author is a college professor
          B．the author thinks the cost of a university education is too high for people to afford
          C．the author considers the university education quality very important
          D．the author pays special attention to the all-round development of college students
          小題5:Which of the following can be the best title?
          A．It’s time to shorten the learning process
          B．Best learning takes place over time
          C．University education should be watered down
          D．College education calls for reform
          

			
          

			
          
			查看答案和解析>>		
          
				
		
          
			
          
				科目：高中英語(yǔ)
				來(lái)源：不詳
				題型：閱讀理解
			
          

						
          Do you know mulch? Mulch is a protective cover of material that is spread on top of soil. It is usually made out of organic material, like crop waste. Farmers may keep the remains of corn or other crops on top of the soil. This creates mulch on the soil surface. The plant remains help protect the soil against wind and water damage. Mulching is one of the best things people can do for their plants. It also helps keep the soil from getting dry, and reduces the need for watering plants. It also limits temperature changes in the soil. And it stops unwanted plants, or weeds, from growing.
          Organic mulch improves the condition of soil. As the mulch breaks down, it provides material which keeps the soil from getting hard. This improves the growth of roots and increases the movement of water through the soil. It also improves the ability of the soil to hold water. Organic mulch contains nutrients for plants. It also provides good environment for earthworms and other helpful living things in the soil.
          It is easy to find organic mulch materials. Cut-up leaves and small pieces of tree bark can be used. Grass cuttings are also a good mulch for plants. Mulch from news- papers works well in controlling weeds.
          The best time to add mulch depends on your goal. Mulch provides a thick barrier between the soil and the air. This helps to reduce temperature changes in the soil. As a result, mulched soil will be cooler than other soil in the summer. In winter, the mulched soil may not freeze as deeply as other soil. The best time is after the ground has frozen, but before the coldest weather arrives. Spreading mulch before the ground has frozen may attract small animals searching for a warm place to spend the winter. Delaying the spreading should prevent this problem. The animals will probably find another place to live.
          小題1:The author tells us the following EXCEPT ______.
          A．what mulch is and its advantages
          B．the best time to add mulch
          C．the bad effects of mulch
          D．what can be mulch on the soil surface
          小題2: The following can be used as organic materials to make mulch EXCEPT ______.
          A．tree barksB．plasticC．grass cuttingsD．cut-up leaves
          小題3: The main idea of Paragraph 2 is that organic mulch can ______.
          A．improve the condition of soil
          B．improve the ability of the soil to hold water
          C．provide a good environment for earthworms
          D．improve the growth of roots and increase the movement of water through the soil
          小題4: From the last paragraph, we know ______.
          A．the best time to add mulch is in spring and summer
          B．the best time to add mulch is after the coldest weather arrives
          C．the best time to add mulch is exactly the same time of each year
          D．choosing the best time to add mulch can avoid attracting small animals
          

			
          

			
          
			查看答案和解析>>		
          
				
		
          
			
          
				科目：高中英語(yǔ)
				來(lái)源：不詳
				題型：閱讀理解
			
          

						
          Most students try to learn English grammar using grammar textbooks. They study grammar rules and take grammar tests. They use an analytical（分析的） approach, attempting to memorize, and then apply, a great number of rules.
           However, research has proved this method inefficient and ineffective. The truth is, the human brain simply cannot consciously remember process and use hundreds of or thousands of grammar rules. Real speech is too fast.
           Native speakers do not learn grammar in this way, but rather intuitively (憑直覺地) and unconsciously. They learn in a complete way, not by attempting to memorize individual grammar rules. As a result, native speakers use correct grammar fluently and easily. 
           Fortunately, it is possible for English learners to learn grammar this way. Language teacher Blaine Ray has developed a unique "intuitive" approach to teach English grammar. Her system uses "point of view" stories to teach the patterns of English grammar, allowing students unconsciously to acquire correct grammar without ever studying grammar rules. 
           In this system, the teacher first tells a simple story from one point of view. It may be told about the past, then repeated, but beginning with "since he was a child"; then repeated again, but this time about the future. 
           Listening to these stories allows students intuitively and effortlessly to learn English grammar and makes them be able to use it correctly when they speak.
           Point of View Stories is a creative new way to study English grammar, and offers hope to millions of frustrated English learners.
          小題1:Which of the following ways is approved by the author?
          A．Remembering grammar rules.
          B．Taking grammar tests.
          C．Analyzing grammatical structure.
          D．Applying language to situations.
          小題2: What does the underlined part "this way" in the fourth paragraph refer to?
          A．Talking to native speakers when learning.
          B．Learning English grammar in a complete way.
          C．Using correct English grammar.
          D．Learning English grammar from a teacher.
          小題3:From this passage we learn that ______.
          A．native speakers learn English grammar by listening to stories
          B．Blaine Ray’s method gets students to grasp correct grammar unconsciously
          C．Blaine Ray teaches grammar rules by asking students to tell stories
          D．it’s hard for students to speak correct English in the new system
          小題4:This passage wants to ______.
          A．criticize the traditional way of learning grammar
          B．introduce a new way to study English grammar
          C．a(chǎn)sk students to learn English grammar by listening to stories
          D．tell us how the native speakers learn English grammar
          小題5:Why shouldn’t the English learners use an analytical approach?
          A．because the analytical approach can let them learn English grammar effortlessly
          B．because the analytical approach makes them be able to use English correctly when they speak.
          C．because the analytical approach can’t let them memorize and then apply a great number of rules.
          D．because Real speech is too fast.
          

			
          

			
          
			查看答案和解析>>		
          
				
		
          
			
          
				科目：高中英語(yǔ)
				來(lái)源：不詳
				題型：閱讀理解
			
          

						
          Some scientists say that animals in the ocean are increasingly threatened by noise pollution caused by human beings. The noise that affect sea creatures comes from a number of human activities. It is caused mainly by industrial underwater explosions, ocean drilling, and ship engines. Such noises are added to natural sounds. These sounds include the breaking of ice fields, underwater earthquakes, and sounds made by animals themselves.
          Decibels（分貝）measured in water are different from those measured on land. A noise of one hundred and twenty decibels on land causes pain to human ears. In water, a decibel level of one hundred and ninety-five would have the same effect.
          Some scientists have proposed setting a noise limit of one hundred and twenty decibels in oceans. They have observed that noises at that level can frighten and confuse whales.
          A team of American and Canadian scientists discovered that loud noises can seriously injure some animals. The research team found that powerful underwater explosions were causing whales in the area to lose their hearing. This seriously affected the whales’ ability to exchange information and find their way. Some of the whales even died. The explosions had caused their ears to bleed and become infected.
          Many researchers whose work depends on ocean sounds object to a limit of one hundred and twenty decibels. They say such a limit would mean an end to important industrial and scientific research.
          Scientists do not know how much and what kinds of noises are harmful to ocean animals. However, many scientists suspect that noise is a greater danger than they believed. They want to prevent noises from harming creatures in the ocean.
          小題1:According to the passage, which of the following is increasingly dangerous to sea creatures?
          A．The man-made noises.
          B．The noises made by themselves.
          C．The sound of earthquakes.
          D．The sound of the ice-breaking.
          小題2:As to the influence of noises on whales, which of the following statements is true?
          A．They are deaf to noises.
          B．Noises at a certain level may hurt them.
          C．They are easily confused by noises.
          D．Noises will limit their ability to reproduce.
          小題3: We can know from the passage that many scientists think that the noise limit of one hundred twenty decibels would______.
          A．prevent them from doing their research work
          B．benefit them a lot in their research work
          C．do good to their health
          D．increase the industrial output
          小題4:According to the passage, what will scientists most probably do in the future?
          A．They will try their best to decrease noise.
          B．They will work hard to cut down noise pollution.
          C．They will study the effect of different noises.
          D．They will protect animals from harmful noises.
          

			
          

			
          
			查看答案和解析>>		
          
				
		
          
			
          
				科目：高中英語(yǔ)
				來(lái)源：不詳
				題型：閱讀理解
			
          

						
          The World's Largest Insect .This giant insect can be used as a toy. 
          A child ties one end of a string to a stick and the other end around the "neck" of an insect. Holding the stick, the child lets the insect go. With a loud whirring sound, the insect takes off, pulling the string in a large curve over the child's head. The child laughs as the stick jumps around. The child is African, and the toy is the African Goliath beetle, the largest insect in the world. 
          The Goliath is a true insect because it has six legs and a body that is divided into three parts. Like all beetles, it has two pairs of wings. The front pair are thick and stiff and protect the back pair, which are soft. It is these soft back wings that make the beetle fly forward. They also cause the loud whirring sound the beetle makes when it flies. To steer, the beetle twists and turns its legs the same way you steer a bike by turning its front wheel. 
          African children often use the Goliath beetle as a toy. Although it is over 15 centimeters long, it is quite harmless. 
          小題1: The African Goliath beetle is _______. 
          A．the world's largest insect
          B．a(chǎn) toy used in many parts of the world
          C．the only insect found in Africa
          D．the world's smallest insect
          小題2:What do African children often use the Goliath beetle as?
          A．a(chǎn) tool.B．a(chǎn) toy. C．harmfull insects.D．Good animals.
          小題3:We know the Goliath beetle is a true insect because it _______. 
          A．makes a whirring sound when it flies B．has both soft and hard wings
          C．has six legs and a body with three parts D．can fly
          小題4:When flying, the Goliath steers by_______. 
          A．turning its soft back wings
          B．twisting and turning its hard front wings
          C．twisting and turning its legs
          D．twisting and turning its whole body
          

			
          

			
          
			查看答案和解析>>		
          
				
		
          
			
          
				科目：高中英語(yǔ)
				來(lái)源：不詳
				題型：閱讀理解
			
          

						
          Over 60﹪of pupils in South African schools choose English for learning and teaching, but only 7﹪of pupils speak English as their home language, a recent South Africa survey shows.
           Out of the country’s 12.2 million pupils only 851,536 speak English at home, yet 7.6 million pupils choose English as their favorite language of learning and teaching. Zulu is the most widely spoken home language, spoken by over 3.1 million pupils. However, less than a third of them choose to be taught in Zulu. The same thing is true of Pedi-speaking pupils, only a third of such pupils choosing to be taught in their home language. Besides English, 
          Afrikaans is the only language that has more pupils choosing it as their language of instruction than it has pupils who speak it at home. In primary schools, most pupils will choose African languages. As early as grade four, many would choose English or Afrikaans in their lessons.
           The rising number of English-learning pupils is mainly caused by social and cultural reasons. English is the most common spoken language in official and public life in South Africa, the survey reports. In April 2011, the leaders of higher education and training said that they would take some steps to improve the university teaching and prevent the continuing decline of African languages. They suggested that in future every South African university student could be required to learn at least one African language in order to complete their studies at school.
          小題1: We can learn from the passage that most South African pupils__________.
          A．speak English both at home and at school
          B．a(chǎn)re required to learn two languages at school
          C．choose English as their primary school language
          D．a(chǎn)re expected to speak their native language at home.
          小題2: It can be inferred from the passage that__________________.
          A．Afrikaans is the most popular home language in South Africa
          B．it’s easier for South African pupils to learn Afrikaans at school.
          C．the number of South African pupils learning Afrikaans has increased
          D．many South African pupils use Afrikaans at school instead of at home.
          小題3: The underlined word “decline” in the last paragraph is closest in meaning to “_________”.
          A．going downhill
          B．spreading widely
          C．growing upwards
          D．developing further
          小題4: What is the survey in the passage mainly about?
          A．The use of native languages in South African families.
          B．The language choice and use among South African pupils.
          C．The progress in South Africa’s language teaching education
          D．The spread of English at schools in South Africa.
          

			
          

			
          
			查看答案和解析>>		
          
				
		
          
			
          
				科目：高中英語(yǔ)
				來(lái)源：不詳
				題型：閱讀理解
			
          

						
          The fourth round of heavy smog to hit Beijing in four weeks has sent more people to the hospital with respiratory (呼吸的) illnesses and led to calls for laws to control the pollution.
          Pan Shiyi, a celebrity, said he is planning to propose a Clean Air Act to the local government. As a representative to the Beijing Municipal People's Congress, he started an online survey at 9:20 a.m. Within three hours, more than 25,000 web users, or 99 percent of total respondents (應(yīng)答者) , welcomed his proposal.
          They have good reasons to stand alongside Pan. The latest round of haze（霧霾）reduced visibility to under 500 meters in many parts of the city. The smog has also led to a great increase in respiratory illnesses, particularly among children and the elderly. Anxious parents and doctors almost all blame the smoggy air for the illnesses. Though most schoolchildren are home for the winter holidays, the bad air can easily move indoors. Besides, ordinary medical masks fail to provide enough protection, so some people have turned to gas masks.
          The causes of the frightening smog are rather mysterious, though experts blame too much emissions (排放) and the mountains around Beijing that trap pollution in winter, unless there is enough wind to clear it away. Some critics blamed China’s top two oil firms, China National Petroleum Corp and China Petrochemical Corporation, saying the companies’ outdated production technologies produce large quantities of high-polluting gas fuel.
          Meanwhile, some Beijingers have moved their brainstorming discussion to computers. If Pan’s proposal for a Clean Air Act is adopted, netizens say the new law should include items providing for “car-free days” in times of smog, higher standards for vehicle fuel, stricter limit to industrial and engine gas emissions, and more effective protection for the public. 
          Beijing is not the only city that has ever lost the blue sky. Five days of thick fog caused thousands of deaths in Britain in December 1952, urging the government to pass the first Clean Air Act in 1956, which introduced smokeless zones and cleaner fuels to reduce pollution. That may provide some experience for Beijing to refer to.
          小題1:Why did Pan Shiyi started an online survey?
          A．To know the public’s opinions on pollution
          B．To tell people the danger of the smoggy weather
          C．To call on people to support his proposal
          D．To collect supporting evidence for his proposal
          小題2:What can we learn from the passage?
          A．People are clear about the causes of the smoggy weather. 
          B．Children staying indoors will not get respiratory illnesses. 
          C．Smog is worse for people with lower resistance to diseases. 
          D．Masks can give people protection against the smoggy weather.
          小題3:Britain is mentioned in the last paragraph to ______.
          A．suggest Beijing should learn from other countries
          B．let people know many places have this problem 
          C．tell people the situation in Britain is worse
          D．call on the government to pass Britain’s Clean Air Act
          小題4: What’s the best title for this passage？
          A．The Use of Gas masks and Engines
          B．Beijingers Call for Clean Air Act
          C．Effective Protection for Blue Sky
          D．The Mysterious Causes of the Scary Smog
          

			
          

			
          
			查看答案和解析>>		
          
				
		
          
			
          
				科目：高中英語(yǔ)
				來(lái)源：不詳
				題型：閱讀理解
			
          

						
          “I don’t speak English”-these are the first words I learned when I came to America. Soon I was able to pronounce the four words clearly, and said them whenever an American tried to talk to me. This answer was very effective（有效的）at ending our conversation and saving me from another uncomfortable situation, or I would have to communicate in a language that I was not familiar with.
          Before coming to the States, I thought I knew English pretty well. But the truth is that the grammar and vocabulary-based English that is taught in schools overseas（海外的）is not the English people speak in America.
          But fear not! Once you are in America, you can immediately begin to bridge the gap（彌補(bǔ)差距）between the learned English that you already know, and the spoken English that is all around you. To do this, first of all, it is important not to fear when you realize that you may not be as prepared for daily communication as you thought. For me, as soon as I stopped worrying about my accent and started speaking, I made rapid progress. Often the people didn’t notice my mistakes because they were so glad to finally be able to communicate with me.
          Another good idea is to listen carefully and pay attention to the way in which ideas are expressed. For example, if you are working hard and you want to stop working and rest for a little while, you can either say “I would like to stop working and rest for a while” or “I want to take a quick break from work.” The first sentence, I quickly learned, sounds dry and too formal for any kind of communication, while the second is an idiom（成語(yǔ)）that is widely used in American English conversation.
          Finally, use what you already know---the vocabulary, the grammar and the spelling. Try to use these into the spoken language for more impressive and accurate（精確）speaking results.
          小題1:What’s the main idea of this passage?
          A．You’d better say “I don’t speak English” in the USA.
          B．How you can improve your spoken English in the USA.
          C．Idioms are widely used to express your ideas in the USA.
          D．Listening is the best way to improve your spoken English in the USA.
          小題2:At first the writer preferred to use the sentence “I don’t speak English” to       .
          A．a(chǎn)dmit he is a foreigner
          B．save much time for himself
          C．prevent himself from being laughed at
          D．a(chǎn)void getting upset in communicating with others
          小題3:What’s the problem with the English taught outside the English-speaking countries?
          A．It is quite different from what the natives speak.
          B．It is taught in boring and wrong grammar.
          C．It has nothing to do with English. 
          D．It has too small a vocabulary.
          小題4:When did the writer make rapid progress in spoken English?
          A．As soon as he paid attention to the way Americans spoke.
          B．The minute he found what has been learned useless.
          C．The moment he got rid of the fear of speaking.
          D．Immediately he arrived in the USA.
          小題5:All the following are tips given buy the writer EXCEPT “       .”
          A．speaking bravelyB．listening carefully
          C．using what you have learnedD．making few mistakes
          

			
          

			
          
			查看答案和解析>>		
          
			
          
	
          
		
          


          同步練習(xí)冊(cè)答案