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    5．While working in the country, the students a great deal of knowledge on plant life. A. looked up B. picked up C. put up D. called up 【查看更多】

     

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    While working in the country, the students ______ a great deal of knowledge on plant life.

    A. looked up                 B. picked up                 C. put up                     D. called up

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    While working in the country, the students ________ a great deal of knowledge on plant life．

    [　　]

    A．looked up

    B．picked up

    C．put up

    D．called up

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    用pick up的正确形式填空并推测其含义。

    While working in the country, the students ________ a great deal of knowledge on plant life．

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