===== (1) =====
1. e) war
2. b) pessimistic
3. a) false
4. d) voyage
5. c) vitamins
===== (2) =====
6. a) shall
7. c) would
8. a) to fight
9. b) hadn't planted
10. c) the tallest
===== (3) =====
11. speaking
12. accompaniment
13. happily
14. tired
15. logical
===== (4) =====
16. e) people can fly to Mars take medicine for all illness
17. c) but I was very busy with my project at school
18. a) Are you looking for the future with optimism?
19. d) I must stop writing
20. b) Best wishes,