题目

题型：不详难度：来源：

The man is____ a serious nervous breakdown because he is unable to deal with pressure from daily life.

A．at the edge of

B．on the edge of

C．on behalf of

D．on the top of

答案

B

解析

考查介词短语辨析。句意：这个人因不能处理日常生活得压力而处于心理崩溃的边缘。On the edge of 正处于----的边缘符合句意；at the edge of 在----的边缘；on behalf of代表；on the top of在---的顶部。