2.sometime:有时.

　 some times:数次.

　 sometime:在某日,有朝一日.　 eg:I saw him sometimes last year.

　 some time:一段时间.　　　　 eg:I waiting for you for some time.

1.exercise:[vi]锻炼　 [n]锻炼

　具体的运动,体操,练习:[c,n]morning exercise　 eg:Doing eyes exercise is good for your health.

　笼统的运动:[uc,n]　 eg:You're getting fat.You'd better do more exercise.

　16-20 BDBAC 21-25 ACCDC 26-30 BBCAD

9. What are；talking 10. a little long

6. between；and 7. Do；have to 8. Turn left

4. Thousands of；are watching 5. busy looking after

5. Crystal has a pen pal in the United States.

　Ⅳ. 1. as soon as possible 2. kind to；afraid of 3. a lot of

4. Where is your favorite sweater from?

3. Tom’s friend can speak a little Japanese.

2. Are your tennis rackets made in China?