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    Why the explosion occurred was the laboratory attendant had been careless. A. for B. because C. since D. that 【查看更多】

     

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    Why the explosion occurred was ____the laboratory attendant had been careless.

    A. for        B. because             C. since           D. that

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    Why the explosion occurred was ________ the laboratory attendant had been careless.

    A. for

    B. because

    C. since

    D. that

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     Why the explosion occurred was ____the laboratory attendant had been careless.

    A．for

    B．because

    C．since

    D．that

     

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    Why the explosion occurred was ____the laboratory attendant had been careless.

    A．for B．because C．since D．that

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