The police tried________ to break up the protest crowds.
A.in vainB.in a vainC.on vainD.on a vain在线课程A
in vain 徒劳;白辛苦,为一固定用法。句意为“警察企图驱散抗议的人群,但没有成功”。
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The police tried to break up the protest crowds.A.in vainB.in a vainC.on vainD.on a vain
编辑:chaxungu时间:2026-04-24 12:55:16分类:高中英语题库
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