Question

In China and some other countries, it is impolite to speak loudly _______ you are having a meal.
A. before           B. while         C. after

Answer 1

B

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。