1. worked
2. is explaining
3. to go
4. to hear
5. standing
6. awarded
7. has been employed
8. is
9. have been
10. to take
11. arrives
12. is sung
13. to turn
14. spelling
15. makes
16. has increased
17. are planted
18. has been writing
19. have knocked
20. stop
II
1. Despite being old, they work very hard
2. In spite of the difficult test, we could finish it
3. We went to the party on time although The traffic was heavy
4. Despite not having enough money, my brother buys a lot of books.
5. He used to be hard-working student
6. Although it rained, we went to school
7. The man who is wearing a blue shirt is my uncle
8. The house which was designed by a famous designer has just been bought
9. The boy whom you have just met at the front gate is my neighbor
10. The teacher whose course we are taking is very kind