________last Saturday, we had two football matches with Class Two.

Last Saturday, we were walking along the street _____ a car suddenly knocked an old man over.

A when   B while   C as   D since

用括号内所给词的适当形式填空（每空不限一词）。

1．My daughter practises            （play）the piano at the weekend．

2．--How many times have you been to Hong Kong? --            （two）．

3．Leo is active in sports．He is the           （strong） of all in his class．

4．I don't think the diamond belongs to             （she）．

5．The            （education） system in America is quite different from that in China．

6．Last Saturday we went to the airport to meet those             （win）．

7．Which city has               （little） polluted air, Taizhou or Zhenjiang?

8．Can you tell me the time of her             （arrive） ?

9．Mr. Lu donated a lot of money to Project Hope            （generous）．

10．Timmy and I are good friends and we keep our secrets to         （we）．

11．Linda often advises Alan              （watch）CCTV news every day．

12．--How was your picnic? --Great! We           （have）a good time by the lake．

13．There            （be） a new bridge over the Changjiang River in several years．

14．Tom              （argue） with his father when I came to his house．

15．The old in the home for the elderly             （take） to the hospital for medical treatment once a year．