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           Never _______ protecting our earth. It is the only nice planet for us to live on.
          A．leave forB．learn aboutC．give upD．look up
          			
          


			
          

		
          
		
		
	
          
		
          
			
          
				
          
				
          C

          試題分析：句意:不要放棄保護(hù)我們的地球。對(duì)于我們來說只有一個(gè)星球可以居住。leave for 離開去某地；learn about 了解；give up 放棄；look up 查找。根據(jù)句意可知，這里讓我們不要停止保護(hù)地球。give up doing sth. 放棄做某事。故選C。
          				
          
							
          
			
          
			
          
			
			
          
		
          
	
          

		
          

		





			
          
		
          
		
				
          
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