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          ----Must we clean the classroom now?
          ----No, you _________. It _________ after school.
          A．needn’t, must be cleanedB．mustn’t, needn’t be cleaned
          C．needn’t, can be cleanedD．don’t have to, may clean
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C

          試題分析：句意為：---我們現(xiàn)在必須打掃教室嗎？---不必。教室可以放學(xué)后打掃。must引起的一般疑問句，其否定回答應(yīng)用needn’t，表示不必。根據(jù)語(yǔ)境，it（指教室）是動(dòng)作的承受者，應(yīng)用被動(dòng)語(yǔ)態(tài)。故選C。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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