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    精英家教网 > 初中英语 > 题目详情

    The scientists ________ on the new medicine for two years. They will succeed in no time.

    A．work B．are working C．have worked D．will work 

    C

    解析试题分析: 句意：科学家们已经研制这个新药两年了，他们马上就要成功了。 in no time马上；根据for
    two years两年，可知时态为现在完成时，故选C.
    考点：考查现在完成时。

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