日韩亚洲一区中文字幕,日韩欧美三级中文字幕在线,国产伦精品一区二区三区,免费在线欧美性爱链接

      1. <sub id="o5kww"></sub>
        
<legend id="o5kww"></legend>
        <style id="o5kww"><abbr id="o5kww"></abbr></style>
        <strong id="o5kww"><u id="o5kww"></u></strong>
        

        2. 


          
	
          
		
	
          
	
          
		
          
			
		
          
		
          
	
          

          



          

          

          


          

          
	
          
	
          


			
          
				
          Our government has done a lot to solve the shortage of oil, but it may take some time _____ we have enough.

          A. after 
          B. since 
          C. before 
          D. unless 
          			
          

			
          
				
          
		
		
	
          
		
          
			
          
				
          
				C				
          
			
          
			
          
				
          
			
          
			
          
				
          
			
          
			
          
				
          
			請(qǐng)?jiān)谶@里輸入關(guān)鍵詞：
					
					
			
          
			
          
			
          
		
          
	
          
		
		
          
			
          
			
			
		
          



							
          
				相關(guān)習(xí)題
			
          	
						
          
			
          
				科目：高中英語
				來源：0112    期中題
				題型：單選題
			
          
									
          Our government has done a lot to solve the shortage of oil, but it may take some time _____ we have enough.
          

          [     ]
          A. after 
          B. since 
          C. before 
          D. unless 
          

			
          
				查看答案和解析>>
			
          
		
          
				
          
			
          
				科目：高中英語
				來源：
				題型：
			
          
									
          Our government has done a lot to solve the shortage of oil，but it may take some time     we have enough．
              A．a(chǎn)fter          B．since             C．unless             D．before
          

			
          
				查看答案和解析>>
			
          
		
          
					
          
	
          
		
          


          同步練習(xí)冊(cè)答案