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Looking back their senior school life, many university students said they____have wasterd so much time on computer games then.

—It’s hard to believe that Jack ________ have fought with the policeman.
—Yes. If one ________ ask for trouble, it can’t be helped.

    
18.  I can' t leave. She told me, that I_____stay here until, she comes back.

17．I ______ you my bicycle, but I didn't expect you would come back so soon·

2．Despite the fact that Betty is a lovely girl, she___________be extremely difficult to work with sometimes.

 
23. You were late again this morning! You ______ have been here earlier. We were about to start without you. 

25. — Real Madrid is sure to win the match!
— It's hard to say. You know, anything _____ happen even in the last minute.

—We’ve missed the last bus! Now We’ll have to walk home．
Yes, we       the library five minutes earlier．

—Sorry，Mum, I lost my key to the bicycle again．
—Oh! How         you be so careless! You have to learn to look after your belongings．

 
25. Mike _______ have known the solutions to this problem, or he would have told us.