情境交际, 根据对话内容,从下面方框中选择适当的句子补全对话

A: Excuse me，Lin Peng. Could you tell me something about the population of China?

B: Certainly.

A: What's the population of it?

B:

A: It has a large population, doesn't it?

B: Yes. It has the largest population in the world.

A:

B: Yes， it causes many problems， such as poor living conditions(条件)，not enough food and a lot of traffic.

A:

B: You're right.

A:

B: No. I'm the only child in my family.

A. Does the large population cause problems? B. By the way, do you have a large family? C. What do you want to know? D. The government must do something to stop the population increase. E. About 1.37 billion.