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. 


          
	
          
		
	
          
	
          
		
          
			
		
          
		
          
	
          

          



          

          

          


          

          
	
          
	
          

          精英家教網 > 高中英語 > 題目詳情
          

			
          
				
          The teacher, along with his students, _____ experiments in the laboratory when the explosion happened. 

          A. were doing 
          B. have been doing
          C. was doing 
          D. had done 
          			
          

			
			
			
		
          



							
          
				相關習題
			
          	
						
          
			
          
				科目：高中英語
				來源：期末題
				題型：單選題
			
          
									
          The teacher, along with his students, _____ experiments in the laboratory when the explosion happened. 
          

          [     ]
          A. were doing 
          B. have been doing
           C. was doing 
          D. had done 
          

			
          
				查看答案和解析>>
			
          
		
          
					
          
	
          
		
          


          同步練習冊答案