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    A.to require B.required C.requiring D.are required 【查看更多】

     

    题目列表(包括答案和解析)

    Textbooks___to come in time.  
    [     ]
    A. require    
    B. are required  
    C. required    
    D. are requiring

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    Text books ________ to come out in time.

    [　　]

    A．require
    B．required
    C．are required
    D．are requiring

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    Text books ________ to come out in time.

    [　　]

    A．require
    B．required
    C．are required
    D．are requiring

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    At the entrance all passengers _____ to show their tickets.

    A. required       B. are required       C. require        D. are requiring

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    从所给的四个选项中选择最佳答案

    Text books ______ to come in time．　　　

    [　　]

    A．require　　　B．required　　　C．are required　　　D．are requiring

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