A: What are you doing?
B:
A: Great! Can you tell me something about the book?
B: Certainly! It says 1,000 years ago, the world's population was very small.
A: Really?
B: Yes, but during the last three or four hundred years, the world's population has grown very quickly. Today, it is growing faster than ever before.
A: Sorry, I don't know.
B: It's more than 7. 2 billion.
A: It's so large.
B: Yes. If we don't control the population, there will be not enough space even to stand for people on Earth in 600 years.
A:
| A. Do you know what the world's population today is? B. I'm reading a book about the world's population. C. What's the population? D. It's too terrible. E. It was less than 0. 3 billion. F. I think we must do something to control the population. |
