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    37．---Who it be that is knocking at the door? ---It be Mother, but I’m not sure. A．can; must B．can; may C．must; can D．may; must 【查看更多】

     

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    .---Who ________ it be that is knocking at the door?

    ---It________ be Mother, but I’m not sure.

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

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    —Who ________ it be that is knocking at the door?

    —It________ be Mother, but I’m not sure.

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

    查看答案和解析>>


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