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    6．-What to them? -They appeared in the accident. A. happened; to have been injured B. had happened; to be injured C. happened; injured D. have happened; to be injured 【查看更多】

     

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    —What ________ to them?

    — They appeared ________ in the accident.

    [　　]

    A．have happened, to be injured

    B．happened, to have been injured

    C．had happened, to be injured

    D．happened, injured

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    －What ________ to them?

    －They appeared ________ in the accident.

    [　　]

    A．have happened; to be injured

    B．happened; to have been injured

    C．had happened; to be injured

    D．happened; injured

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