Помогите пожалуйста безотлагательно

1) taller than
2) better
3) the most dangerous
4) the biggest car
5) heavier than
6) thinner than
7) slower than
8) the nicest 
9) the best
12) easier
13) nicer than
14) better than
15) the best
16) more dangerous
17) more serious than
18) smarter than
19) the most expensive
20) the best
21) funnier than