I don't know ____ it is meant for.
问题描述:
I don't know ____ it is meant for.
A.that B.whom C.how D.why
答
b 宾语从句中缺宾语 所以用whom
that 是绝对不可以出现在却成分的宾语从句中的.只有宾语从句什么都不缺的时候才能够用that 作为引导词.