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          Bob ______ his bedroom by himself. Look! How clean it is!
          A. sweeps                  B. swept                    C. has swept   
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C

          試題分析： have/has+動詞過去分詞，構(gòu)成現(xiàn)在完成時，Bob是第三人稱單數(shù)，用has+過去分詞。sweep的過去分詞為swept。句意：鮑勃自己打掃了臥室，看，多干凈��！故選C。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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