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    ( ) It’s very hard the swamp. A. across B. cross C. to across D. to cross 【查看更多】

     

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    It's very hard _________ the swamp(沼泽).

    A.across　　B，cross　　C.to across D.to cross

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    It’s very hard ________ the swamp．

    [　　]

    A．across

    B．cross

    C．to across

    D．to cross

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