题目内容：

词形变换

1.Boys and girls, do you know the ____________ (首都) of these countries?

2.Every day, there are ___________ (百万) of pieces of news on the Internet.

3.What useful __________ (信息) ! Thank you for helping me so much.

4.How poor the _____________ (生病的) dogs look!

5.Peter lives on the           (twelve) floor in this tall building.

6.Volunteers in our school can help you fix your _________ (break) computers.

7.Do you know the __________ (policeman) in white shirts in front of the gate?

8.I met an old classmate of ____________ (I) on my way to school.