The police tried _____ to break up the protest crowds. [ ]A. in a vainB. in vainC. in the vainD. for

题目简介

The police tried _____ to break up the protest crowds. [ ]A. in a vainB. in vainC. in the vainD. for

题目详情

The police tried _____ to break up the protest crowds.
[     ]
A. in a vain
B. in vain
C. in the vain
D. for vain
题型:单选题难度:偏易来源:0111 期末题

答案

B

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