1 . With a p________ of 0.28 billion people over 60 years old, China is facing an increasing serious aging problem.

2 . The ________ (人口) of China will fall by about 20 percent in the next 30 years.

3 . The main ________ of the cities along the Grand Canal (大运河) is history and culture.

A．attraction

B．pollution

C．population

D．situation

4 . The ___________ (人口) is increasing at about 6% per year.

5 . The ________ has increased from 1. 2 million to 1. 8 million. (人口)

6 . Can you tell me the total number of people in your capital?
Can you tell me the ________ of your capital?

7 . The entire ________ /ˌpɒpjʊˈleɪʃən/ of the town was at the meeting.

8 . —China’s high-speed railway ________ is leading the world.
—That’s right. It is moving further into the world.

A．population

B．environment

C．technology

D．discovery

10 . It’s true that a larger _________（人口）requires more schools and houses.