He is one of those men who____to be friendly,however,it's very hard to deal with him.A.used B.prove C.looks D.appears为什么?
问题描述：
He is one of those men who____to be friendly,however,it's very hard to deal with him.
A.used B.prove C.looks D.appears
为什么?
答
used to 是固定用法，所指的过去的意思。
i used to be a doctor 我过去是个医生，也隐含特指现在不是了
答
D
答
A. used
B,前后矛盾.
C,D. 要用必须是look, appear