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          The light is on in Mr. Green’s room. He _______ be at home.
          A．mustB．canC．mustn’tD．can’t
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A
          本題的含義是格林先生房間的燈是開(kāi)著的，所以他在家的可能性是最大，用一定在家較符合題意，must表示一定的意思，故本題選A。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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