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

試題分析：句意:在中國和其他一些國家當吃飯的時候大聲說話是不禮貌的。A. before在……之前；           B. while當……時候； C. after在……之后，根據句意此題選B。