题目内容
I wonder when they ___ for Beijing. I will go to the train station to see them off when
they ______.
| A．leave, will leave | B．will leave, leave |
| C．will go, leave | D．go, leave |
B
解析试题分析：句意：我想知道他们什么时候动身去北京。当他们离开的时候，我要去车站为他们送行。第一句考查宾语从句的时态，当主句是一般现在时，从句时太不受主句限制，根据实际情况此处用一般将来时。第二句是考查when引导的时间状语从句，遵循主将从现的原则。根据句意及分析，故选B。
考点：考查动词时态。
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