what to wear和how to wear的区别用法题

题目

what to wear和how to wear的区别用法题
--What are you thinking about?
--I don't know______to a party.
A.how to wear B.what to wear
C.what should I wear D.how can I wear

答案

选B
A how to wear 是怎么穿
B.what to wear 是穿什么
C.what should I wear 要改成 what i should wear 就也对了,宾语从句用陈述句语序.但是因为这个对话是口语,一般人用B完全就OK了,C太冗长