IV) 
1. watching
2. has learned
3. did you collect
4. didn't go
5. am going to go
6. are doing
7. meets
8. playing
9. reads
10. will come
11. watching
12. are playing
13. being
14. have collected
15. did they clean
16. didn't write
17. going
18. are playing
19. don't often talk
20. to go
VII) 
1. What about going to the movies?
2. The black bike is cheaper than the blue one
3. What about listening to some music?
4. A flat is smaller than a house
5. Salad is my favorite dish
6. Have you ever seen a water puppet show?
7. Mary has never seen a monkey
8. What are you doing at the moment?
V) 
1. will be
2. comfortable