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     By the time I got home, Gina and her sister ______ their project already.

    A．finished                               B．have finished

    C．had finished                           D．will finish

     

    【答案】

    C

    【解析】

    试题分析：通过分析可知，吉娜和她的妹妹是在我到家之前就完成了她们的计划。故应该用过去完成时。所以本题选C。

    考点：本题考查时态。

    点评：完成本题需要对过去完成时的用法熟练掌握。过去完成时表示过去时间之前发生的动作。通俗一点说就是“过去的过去”。如本题中的两个动作get和finish，finish就在get之前，故finish就用过去完成时。

     

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