问答题

Directions:
The people from the Mars can not understand why the people on earth should crowd themselves in cities on earth. You are invited to list three advantages to them. They are:
1) the city provides people with a background to learn and study,
2) it provides people with a stage to demonstrate their capability and
3) it is a place where you seldom feel dull.
You should write 160-200 words on ANSWER SHEET2.