Read the definitions carefully and select the correct words.
1. not clear
2. used to show that what you are saying is true in general
3. very unusual or surprising
4. used when expressing an idea that you think is generally true
5. a unit for measuring length, equal to 2
6. too strange to be believed, or very difficult to believe
7. to come down through the air onto something
8. strong enough, well enough planned etc to continue for a very long time
9. to think about something that happened in the past
10. generally
11. to remember a particular fact, event, or situation from the past
12. an act of remembering something
13. to slide a short distance accidentally, and fall or lose your balance slightly
14. to attach something to something else using a substance, or to become attached to a surface
15. an unforgettable experience, sight etc affects you so strongly that you will never forget it, especially because it is particularly good or beautiful
16. unclear because someone does not give enough detailed information or does not say exactly what they mean
17. vivid memories, dreams, descriptions etc are so clear that they seem real