If you be there before 10, you have to say goodbye to each other and set off now. A. are to B. are about to C. will D. will be going to 题目和参考答案——青夏教育精英家教网—

题目内容

If you be there before 10, you have to say goodbye to each other and set off now.

A. are to B. are about to C. will D. will be going to

解析:

if引导的条件状语从句中不能用将来时态表将来，be to相当于must, have to 所以选A。

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