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          【題目】It is _____ must to have a good ______ of a foreign language and a specific skill in such a competitive society.
          A. /; view B. a; command C. a; order D. /; permit
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          【答案】B
          【解析】
          考查固定句型。句意：在這樣一個競爭激烈的社會里，掌握一門外語和一門專門技能是必須的。It is a must to do sth.為固定句型，所以句中要用不定冠詞。have a good command of…，為固定搭配，意為“精通……，……掌握的好”，故選B項。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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