题目内容
4. [2014 •安徽卷〗The twins, who their homework, were allowed to play badminton on the playground.
A. will finish B. finish
C. have finished D. had finished
4. D考查动词的时态。根据语境可知,完成作业是在were allowed之前发生的动作,属于"过去的过去",应使用过去完成时。句意:已完成作业的双胞胎,被允许到操场上打羽毛球。故选D。
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