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          —It smells terrible. What has happened here?
          —Look, there is a chemical factory_____ much waste gas.
          A. pour        B. pouring      C. poured  
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B

          試題分析：句意：好難聞，這里發(fā)生了什么？看，有一個(gè)化工廠正在傾倒大量的廢氣。根據(jù)語(yǔ)境正在傾倒廢氣，所以用現(xiàn)在進(jìn)行時(shí)態(tài)，故選B
          點(diǎn)評(píng)：動(dòng)詞的時(shí)態(tài)是學(xué)習(xí)英語(yǔ)過(guò)程中非常重要的知識(shí)。而很多的題目，必須通過(guò)上文的語(yǔ)境判斷得知時(shí)態(tài)。現(xiàn)在進(jìn)行時(shí)表示動(dòng)詞在某個(gè)點(diǎn)時(shí)間正在進(jìn)行，本題不難，平時(shí)加強(qiáng)記憶，理解即可。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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