By the time you get to Beijing tomorrow, I ______ for Shanghai.A．am leavingB．sho
题型：不详难度：来源：
By the time you get to Beijing tomorrow, I ______ for Shanghai.| A．am leaving | B．should have left | C．will leave | D．will have left |
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答案
| D |
解析
试题分析：考查时态。本题的关键词是by the time…到…时为止；该词经常与完成时连用，如果后面是现在的时间，句中就使用现在完成时；如果后面是过去的时间，就使用过去完成时；如果后面是将来的时间，就使用将来完成时。本题by后面接的时候时间状语从句，使用一般现在时代替将来时，后面的主句使用将来完成时。句意：到你明天到北京的时候，你已经出发去上海了。故D正确。
点评：by the time…到…时为止；该词经常与完成时连用，如果后面是现在的时间，句中就使用现在完成时；如果后面是过去的时间，就使用过去完成时；如果后面是将来的时间，就使用将来完成时。 |
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