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				21．--Who is  singing in the next room?--          must be Susan．A．She         B．It            C．This         D．He			【查看更多】
			


		
           
          


		
          
		
          題目列表(包括答案和解析)
          

		
		
          

          


          
	
          				
          
									
          --Who is singing in the next room?
            
          --         must be Marie．
            
          A．It                        B．She                     C．This                             D．There
          

			
          
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          --Who is singing in the next room?
          --________ must be Marie.

          1. A.
            It
          2. B.
            She
          3. C.
            This
          4. D.
            There
          

			
          
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          —Who is singing in the next room?        
          —______ must be Mary.      
          

          [     ]
          A. She    
          B. This    
          C. It    
          D. He
          

			
          
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          —Who is singing in the classroom? 
          —_____ must be Susan. 
          

          [     ]
          A. She
          B. It
          C. This
          D. He 
          

			
          
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           —Who  is singing in the next room?　
           — It _____ be Lucy. She has gone to Hong  Kong.
              
          A. can’t　　　　  　　　　　 B.  must　　　　  C. may  not　　　　　 D. needn’t
              
                           
          

			
          
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