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          Mr Chen told us that three fourths of the earth ________covered with water.
          A．wereB．isC．wasD．a(chǎn)re
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
          

          解析試題分析：句意：陳老師告訴我們地球的四分之三都被水覆蓋著。賓語從句中的事實為客觀真理，所以時態(tài)用一般現(xiàn)在時，the earth做主語，后面的謂語動詞用單數(shù)形式，故選B。
          考點：考查主謂一致和時態(tài)。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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