When are you leaving for Shanghai? Tomorrow. My train____tomorrow evening

问题描述:

When are you leaving for Shanghai? Tomorrow. My train____tomorrow evening
A.will leaveB.is leavingC.leaves D.is to leave
答案是选C,请问是为什么?怎么不能选B?

用一般现在时态表示事情通常发生的情况,列车发车时间是固定的,所以用一般现在时表示.(这样的话就不用解释c了.)