a)      1. B
2. C
3. A
4. C
5. B
6. D
7. C
8. B
9. B
10. C
 
b)      1. Showing off
2. give up
3. drop off
4. come across
5. show up
6. lift up
7. blown up
8. took off
9. get into
10. break into
 
c)     
1. A
2. B
3. C
4. D
5. E
6. F
7. G
8. H
9. I
10. J