题目内容
The police tried _____ to break up the protest crowds. |
A. in a vain B. in vain C. in the vain D. for vain |
试题答案
B
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The police tried _____ to break up the protest crowds.
[ ]
A. in a vain
B. in vain
C. in the vain
D. for vain
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B. in vain
C. in the vain
D. for vain
The police tried ________________ to break up the protest crowds.
A.in a vain | B.in vain | C.in the vain | D.for vain |