七、完形填空。
Everyone wants to be a good student. Good students 1 obey some rules. In school, they should listen 2 the teacher 3. And they shouldn't make 4 in class. At home, good students should keep 5 room clean. They shouldn't 6 TV too often. Besides, good students 7 spit on the ground and play 8 the street. They must 9 old people and take good care of 10 children.
( )1. A. shouldn't B. should C. mustn't
( )2. A. to B. about C. for
( )3. A. care B. careful C. carefully
( )4. A. talk B. noisy C. noise
( )5. A. his B. their C. they
( )6. A. watching B. watch C. to watch
( )7. A. mustn't B. should C. must
( )8. A. with B. on C. for
( )9. A. helps B. help C. to help
( )10. A. young B. old C. small

1. B；2. A；3. C；4. C；5. B；6. B；7. A；8. B；9. B；10. A