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    -Must they clean the classroom now? -No, they . A. can’t B. needn’t C. mustn’t D. don’t 【查看更多】

     

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    ?Must they clean the classroom now?

    ?No, they ________.

    A. can't

    B. needn't

    C. don't

    D. mustn't

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    — Must they clean and tidy the classroom now?

                      — No, they      . It       after school in the afternoon.

                      A. mustn’t; must clean                                   B. needn’t; must clean

                      C. mustn’t; need be cleaned                         D. don’t have to; can be cleaned

     

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    — Must they clean and tidy the classroom now?

                      — No, they      . It       after school in the afternoon.

                      A. mustn’t; must clean                                   B. needn’t; must clean

                      C. mustn’t; need be cleaned                         D. don’t have to; can be cleaned

     

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    — Must they clean and tidy the classroom now? 
    — No, they           . It            after school in the afternoon.

    [     ]

    A. mustn't; must clean
    B. needn't; must clean
    C. mustn't; need be cleaned
    D. don't have to; can be cleaned

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