题目内容
In China and some other countries, it is impolite to speak loudly _______ you are having a meal.
A. before B. while C. after
B
解析试题分析:句意:在中国和其他一些国家当吃饭的时候大声说话是不礼貌的。A. before在……之前; B. while当……时候; C. after在……之后,根据句意此题选B。
考点:考查连词的用法
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