题目

题型：不详难度：来源：

Although police could be seen everywhere, they seemed to be searching the houses almost ________.

A．at ease

B．at random

C．at risk

D．at length

答案

B

解析

介词短语辨析。at ease安心;自在;不拘束; at random胡乱；at risk处于危险中；at length终于，最后,详细地；句意：尽管随处可以看见警察，但是他们似乎是在胡乱的搜查各个房子。