I asked him _____ how he felt about taking a plane.

问题描述:

I asked him _____ how he felt about taking a plane.
书后答案是about,我填的是that可以吗?为什么?

不可以填that,that和how都可以引导宾语从句,都出现属于重复;
此外,that在此处不符合语义.