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their study, many Chinese students overseas returns to China. A. Completed B. Co

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their study, many Chinese students overseas returns to China. A. Completed B. Co

______ their study, many Chinese students overseas returns to China.

A. Completed   B. Completing

C. Having completedD. To complete

 

试题答案

答案:C

解析:
现在分词作状语,且动作发生在主句动作前,用完成时态。

 

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