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    I was on the highway when his car went past, followed by a police car. They at least 150 km an hour. A. should have been doing B. would have done C. could have done D. must have been doing 【查看更多】

     

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    I was on the highway when his car went past, followed by a police car. They _____ at least 150km
    an hour.
    [     ]
    A. should have been doing
    B. would have done
    C. could have done
    D. must have been doing

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     I was on the highway when his car went past followed by a police car. They ____ at
    least 150 kilometers an hour.
        A. should have been doing              B. must have been doing
        C. could have done                      D. would have done  

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