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    • It is when the plane ______ that you’d better find out at the booking office. 请问，这个选哪个

    A. would take off B. had taken off C. was taking off D. is taking off

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    推荐答案   2014-12-19
    D. is taking off
    这是个强调句. when the plane ______ 是被强调部分, 宾语从句
    原句为:
    you’d better find out at the booking office when the plane [ is taking off]
    你最好在售票处打听一下飞机在什么时候起飞

    可见指的是说话以后的事, 所以选D

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    相似回答
    ...the plane ___ that you’d better find out at the booking office...答：D 注意题干为强调句型。take off用进行时态表示将来。
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