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          Students should do everything they can __their study. 
          A．improveB．to improve
          C．improvingD．improved
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          考查非謂語動詞.句意:學(xué)生們應(yīng)該做任何他們能做的事情來提高他們的學(xué)習(xí). they can為后置定語,動詞不定式做目的狀語,表示具體的將要進(jìn)行的動作,結(jié)合語境可知選B.
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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