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           The astronaut is so  tired that he ______ for eleven hours.
              
          A. has been  asleep    B. has fallen asleep     C. has  gone to bed       D. has gone to sleep
                  
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          
    
    
        	
          
          【答案】A 
              
          【解析】考查現(xiàn)在完成的用法。for eleven hours指一段時(shí)間，不可以用短暫性動(dòng)詞，be asleep指“睡著”的狀態(tài)，fall asleep指“睡著”的動(dòng)作 ，所以選擇答案A。
              
          
         
         
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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