精英家教网 > 高中英语 > 题目详情
The mother didn't know who      the glass because it happened when she was out.
A.breakB.has brokenC.had brokenD.breaks
C

试题分析:考查时态。句意:妈妈不知道是谁打破了杯子,因为这是在她外出的时候发生的。杯子坏了是在妈妈知道之前,而本句的妈妈知道都使用了过去时,故打破杯子使用过去完成时。故C正确。
点评:时态的考查要和语义语境相结合,同时要抓住句中的关键的时间状语
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