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          — ______sleep do you think is necessary for a Grade 9 student?
           — 8 hours at least. 
          A．How oftenB．How longC．How manyD．How much
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D

          試題分析：句意：你認(rèn)為對(duì)于一個(gè)九年級(jí)的學(xué)生多少睡眠是必要的。至少八個(gè)小時(shí)。A. How often 多久一次B. How long 多久  C. How many多少，加不可數(shù)名詞D. How much 多少，加不可數(shù)名詞。sleep,不可數(shù)名詞，故選D。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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