------He didn`t go to bed last night until 12 o`clock. ------Yes. He his experiment over and over, working till midnight. A. played B. showed C. acted D. performed 查看更多

 

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------He didn`t go to bed last night until 12 o`clock.
    ------Yes. He ______his experiment over and over, working till midnight.
  A. played        B. showed     C. acted       D. performed  

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— He didn't go to bed last night until 12 o'clock last night.  
— Yes. He ______ his experiment over and over, working till midnight.  
[     ]
A. played        
B. showed    
C. acted      
D. performed  

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