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				 --- May I go  to the party, Mum?   --- Certainly. But you          be  back by 11 o’clock.  A. can           B.  may            C.  must         D.  might			【查看更多】
			


		
           
          


		
          
		
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          — May I go to the concert with you?
          — I’m afraid not ____ you have a ticket, because I have only one.
          A. since　　   B. if　　  　 C. unless　　 　 D. though
          

			
          
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          –May I go to the concert with you?
          


          – I’m afraid not ______you have a ticket, because I
have only one.
          


          A. since        B.
if        C. unless    D.
though
          


           
          

			
          
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          — May I
go to the concert with you?
          


             — I’m
afraid not ______ you have a ticket, because I have only one.
          


          A. unless                    B.
since                    C.
if                     D.
though
          


           
          

			
          
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          -May I go to the movies with you ?
          -I’m afraid not　　  you have a ticket, because I have only one.
          　　　  A. if　　　　　　　 B. unless　　　　　　　　  C. though
          

			
          
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           ——May I go  to the theatre with you?   
              
          —— I’m afraid not ____  you have a ticket, because I have only one.
              
          A. since                  B.  if                             C.  unless                      D.  though
              
          

			
          
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