1. A. very B. exact C. right D. usual
2. A. officials B. parents C. experts D. schools
3. A. fatigue B. confusion C. duty D. puzzle
4. A. questions B. answers C. standards D. rules
5. A. single B. piece C. page D. other
6. A. drop B. short C. cut D. lack
7. A. acquire B. earn C. gather D. reach
8. A. exercises B. defects C. mistakes D. tests
9. A. perfect B. better C. unusual D. complete
10. A. forget B. refuse C. miss D. ignore
11. A. have B. prepare C. make D. perform
12. A. classes B. groups C. grades D. terms
13. A. about B. no C. much D. few
14. A. previously B. rarely B. merely D. consistently
15. A. finishing B. lowering C. reducing D. declining