题目内容
3.Mary is in a hurry because the train to the airport leaves __________ half an hour.( )A. | by | B. | in | C. | for | D. | until |
分析 Mary很着急,因为去机场的火车半小时后出发.
解答 答案B.考查介词.本题的关键是the train to the airport leaves火车将要离开;在这句话里使用了一般现在时代替将来时,表示按照车站的时间表列车进出.实际上本句是一个将来时,四个选项里只有"in+一段时间"可以和将来时连用.故选B.
点评 考查介词+时间的题,留意题干中的时态.
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