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    28．--Tom isn’t here now. -- left by the back door? A．Must he have B．Had he C．Can he have D．Should he have 【查看更多】

     

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    --Tom isn’t here now.

    　 --________ left by the back door?

    　 A．Must he have　 B．Had he C．Can he have　 D．Should he have

     

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