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    ( )The cars, buses and bikes stop when the traffic lights change to red. A. can B. may C. must D. need 【查看更多】

     

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    Cars, buses and bikes ________ stop when the traffic lights change to red.

    A. can 　　　　  B. may 　　　　　　    C. must 　　　　　　   D. need

     

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