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                 life will continue on the earth for millions of years to come will depend on         the problem of pollution can be solved.
          A．How /whetherB．That/thatC．Whether / ifD．Whether / whether
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          D
          本題考查主語從句和賓語從句。做此題必須要看清楚第一空是一個(gè)主語從句，而第二空是一個(gè)介詞后的賓語從句。因此，根據(jù)句意，生命是否會(huì)在以后的幾百萬年里繼續(xù)將取決于污染問題能否被解決。二空都要填是否。但主語從句“是否”只能用whether,介詞后也只能用whether.所以選擇答案D。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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