Please give me ________envelope, I want to write a letter to my father.
There are lots of things I need to prepare before the trip.
The children decide their school yard this Friday afternoon.
In China and some other countries,it is impolite to speak loudly you are having a meal.
—Must I hand in my homework now,Mr.Smith? —No,you .
It is reported that people throw plastic bags along this street every day.(2015六盘水)