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				4．a(chǎn)bacus			【查看更多】
			


		
           
          


		
          
		
          題目列表(包括答案和解析)
          

		
		
          

          


          
	
          				
          
									
          The abacus was invented ________ by Chinese people.

          1. A.
            in the sixth Century
          2. B.
            in the sixtieth Century
          3. C.
            in the sixteenth Century
          4. D.
            in the six Century
          

			
          
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          The abacus _____ in _____ century by Chinese. 
          

          [     ]
          A. invented; six 
          B. was invented; the sixth 
          C. invented; the sixth 
          

			
          
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          The abacus _____ invented in the sixth century by Chinese people. 
          

          [     ]
          A. be 
          B. is 
          C. was 
          D. were 
          

			
          
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The abacus (算盤) ______ used in China centuries ago.
           
[    ]
          
　　A. was   B. were   C. had been   D. have been
          

			
          
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          --When _____ the abacus _____?   -- In the sixth century by the Chinese people.
          A．is, inventedB．did, inventC．was, inventedD．does, invent
          

			
          
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