__,if he doesn't learn he knows nothing.A.be a man ever so clever B.A man is ever so clever

问题描述:

__,if he doesn't learn he knows nothing.A.be a man ever so clever B.A man is ever so clever
__,if he doesn't learn he knows nothing.A.be a man ever so clever B.A man is ever so clever C.So clever as a man ever is D.NO matter how clever be 这题为什么选A,为什么C是错的呢

这是一个复合句,if引导的是条件状语从句,所以选项必须是一个完整的主句.而选项C不是一个完整的句子,所以不能选C.选项A是一个祈使句.