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          Nearly ______ of the earth _______ covered by sea。
              
            A. three fourth; is    B. three fourths; is
              
            C. three forth; are    D. three fourths; are
                  
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          B
              
          【解析】本題題意為“地球?qū)⒔姆种拿娣e被海洋覆蓋著�！庇⒄Z中的分數(shù)，分子用基數(shù)詞，分母用序數(shù)詞；分子大于1時，分母要用復(fù)數(shù)，首先排除A和C，“分數(shù)+of+名詞”作主語時，其謂語動詞要與of后面的名詞在數(shù)上保持一致，因此答案為B。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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