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				A.to require B.required   C.requiring   D.are required			【查看更多】
			


		
           
          


		
          
		
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          Textbooks___to come in time.   
          

          [     ]
          A. require    
          B. are required   
          C. required    
          D. are requiring
          

			
          
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          Text books ________ to come out in time.
          

          [　　]
          

          

          A．require
          B．required
          

          C．a(chǎn)re required
          D．a(chǎn)re requiring
          

          

          

          

			
          
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          Text books ________ to come out in time.
          

          [　　]
          

          

          A．require
          B．required
          

          C．a(chǎn)re required
          D．a(chǎn)re requiring
          

          

          

          

			
          
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          At the entrance all passengers _____ to show their tickets.
            
          A. required       B. are required       C. require        D. are requiring
          

			
          
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          從所給的四個(gè)選項(xiàng)中選擇最佳答案
          

          Text books ______ to come in time．　　　
          [　　]
          

          A．require　　　B．required　　　C．are required　　　D．are requiring
           

          

			
          
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