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          Trees __________every year to make our city greener.
          A．plantB．are plantedC．were plantedD．will be planted
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          本題的含義是每年我們要栽許多的樹，本題表示的是一般的情況用一般現(xiàn)在時，主語樹為動作的承受者，故本題使用一般現(xiàn)在時的被動句，結構為be+過去分詞，本題的主語是復數(shù)，故本題選B。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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