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    26．-Can children swim in this pool? -Yes. However ,at no time they do so alone. A．may B．need C．could D．should 【查看更多】

     

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    Can children swim in this pool?

    --Yes. However, at no time _____ they do so alone.

       A. may         B. need           C. could           D. should

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    -----Can children swim in this pool?　　　　

    -----Yes. However, at no time _____ they do so alone.

    A. may 　 B. need　 C. could 　 D. should

     

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