(贵州贵阳)In China and some other countries,it is impolite to speak loudly________you are having a meal.A.beforeB.whileC.after
Our hometown ________________ a lot in the past ten years.
The teacher asked _______________.
We are very tired after a long walk. Let’s stop_________ a rest.
_______ it rained heavily, ________ all the students came to school on time.
We are looking forward to ____________ the Great Wall.