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    Nowadays, good babysitters are in great _____, so many companies have been set up to train good babysitters.

    A. request
    B. need
    C. demand
    D. requirement
    C
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    科目：高中英语 来源：同步题 题型：单选题

    Nowadays, good babysitters are in great _____, so many companies have been set up to train good babysitters.

    [     ]

    A. request
    B. need
    C. demand
    D. requirement

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