lesson1

4. absolutely correct; making no mistakes
8. achieving or resulting in the required outcome
10. doing a job, sport, or activity for money, rather than just for fun
12. the place to which someone or something is going or being sent
14. to give something up completely
15. so well designed, easy to understand, or easy to use that is cannot go wrong or be used wrongly
17. not in the correct key, out of tune
18. a process of travelling from one place to another

1. to state positively and confidently; to guarantee
2. a test or trial
3. the state or quality of being stable
5. an ideal, principle, aim, etc, that people support and work for
6. the area near something or someone
7. keen; enthusiastic; intense
9. a substance that is burned to provide heat or power
10. the range of capabilities that someone or something has; powers or resources not yet developed or made use of
11. to stop shaking or moving about
13. to promote or recommend something or someone
16. the object or aim in doing something