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          —The 3G mobile phone has influenced people’s life a lot since it ___
          A．inventsB．invented
          C．is inventedD．was invented
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D
             
          試題分析：句意：自從3G手機(jī)被發(fā)明，他們已經(jīng)對(duì)人們的生活有了很大的影響。since自從……，后加過(guò)去時(shí)態(tài)的句子或過(guò)去的時(shí)間點(diǎn)。被動(dòng)語(yǔ)態(tài)表示主語(yǔ)是動(dòng)作的承受者，即行為動(dòng)作的對(duì)象。被動(dòng)語(yǔ)態(tài)由“助動(dòng)詞be＋及物動(dòng)詞的過(guò)去分詞”構(gòu)成。一般過(guò)去式的被動(dòng)語(yǔ)態(tài)構(gòu)成was／were＋tdone，根據(jù)語(yǔ)境故選D
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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