1.

阅读短文，回答问题。

1. （1） The world's population _______.

   A . will reach 7 billion in the end B . reached 7 billion by the end of 2011 C . reached 7 billion before 2011 D . reached 7 billion in 2000
3. （2） Which country is the third populous in the world by 2050?

   A . China B . Indonesia. C . The U. S. D . Nigeria.
5. （3） When did the world's population grow most slowly?

   A . From 1800 to 1930. B . From 1930 to 1960. C . From 1960 to 1974. D . From 1974 to 1999.
7. （4） The population of China and India made up _______ of the world's population at the end of 2011.

   A . 19% B . 16. 7% C . 35. 7% D . 42. 9%
9. （5） What's the Chinese meaning of “billion”?

   A . 1, 000, 000, 000 B . 100, 000, 000 C . 10, 000, 000 D . 1, 000, 000