CAE 2

3. very intelligent and skilful, or (of a thing) skilfully made or planned and involving new ideas and methods
5. the trait of forming opinions by distinguishing and evaluating
8. the ability to make up one's mind quickly and confidently
11. a question, often expressing doubt about something or looking for an answer from someone
12. a complete change from one system or method to another
14. a change, usually a slight change, in the appearance, character, or structure of something
16. an idea of what something or someone is like, or a basic understanding of a situation or a principle
18. making an important discovery
20. an ability to understand what other people need, and be helpful and kind to them

1. to use something or someone instead of another thing or person
2. a result that is obvious to everyone even before it happens
4. a failure to understand something, or an understanding or belief about something that is not correct
6. to waste time trying to create something that someone else has already created
7. to change the shape of something so that it looks strange or unnatural
9. uninterrupted connection or union
10. the process of becoming completely developed mentally or emotionally
13. to become worse
15. to think and react quickly when something dangerous or difficult happens unexpectedly
17. to suffer something difficult, unpleasant, or painful
19. an idea that is based on feeling and for which there is no proof