An IQ Test

Complete the phrases given only their initials.
Example: 24 H in a D: Answer: 24 Hours in a Day
(Use your common sense)

1. 7 D a W
2. 12 M in a Y
3. 2 W of a B
4. 9 L of a C
5. 3 H of a C
6. 7 D S
7. 9 M of P
8. 8 T of an O
9. 7 C of the W
10. 10 Y in a D
11. 28 D in F
12. 6 S of a H
13. 10 C in a M
14. 7 W of the W
15. 5 F in a F
16. 366 D in a L Y
17. 7 C of the R
18. 60 S in a M
19. 26 L of the A
20. 4 C of a S

No time limit. If you get 17 and above, you're a genius!

(I'm not a genius, but I hope I'm using my common sense. I have answered only 10 so far.)