Across
- 4. a way of solving a problem
- 6. a fully grown person
- 7. more than is usual, expected，additional
- 9. to tell sb that sth is good or useful
- 10. right or fit for a particular purpose
- 12. happy and satisfied with what you have
- 14. unable to stop taking harmful drugs
- 16. a person who does a job without payment
- 17. a formal discussion of an issue
Down
- 1. at a high or difficult level
- 2. unable to think clearly or to understand
- 3. to stop doing sth
- 5. plain or evidently
- 8. have duty for sb/sth
- 11. able to speak, read a language easily and well
- 13. it interests you and makes you want it
- 15. to like one thing or person better than another