题目内容
It is bad manners to ________an invitation without a reason.
A. break down B. settle down C. turn down D. calm down
C
【解析】考查短语动词词义辨识。题意:无故拒绝邀请是不礼貌的。break down:(机械)抛锚;(人的精神)垮掉;settle down:定居;turn down:拒绝;calm down:冷静下来。故C项正确。
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