He did ___ he could ___ me with my math.A.that help B.what help为什么?

问题描述:

He did ___ he could ___ me with my math.
A.that help B.what help
为什么?

B应该是:what;to help
定语从句,A排除.

He did what he could to help me with my math.
感觉应该是这样

B.what help

我怎么觉得没有答案啊,应该是A吧