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          The survey shows that ______ we are enjoying less and less good sleep, rates of heart diseases have risen rapidly． 
          A．whileB．a(chǎn)lthough C．if onlyD．a(chǎn)s though
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          A
          句意：調(diào)查顯示當(dāng)我們正在享受著越來越少的好睡眠時，心臟病的發(fā)病率卻迅速地上升。A. while當(dāng)…的時候；和…同時；B. although盡管，雖然；   C. if only 只要，要是……多好；D. as though仿佛，好像；由句意可知選A。
          考點: 考查連詞和代詞的用法。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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