Verified answer

Задание 1.
1) went - b
2) have - c
3) Did you go... - b
4) is - a
5) do you study - b
6) begins - b
7) keep - c
8) How old are you? - b
9) do - c
10) learn..... have - a      

Задание 2.

fast - faster -  fastest

well - better -  best

neatly - more neatly - most neatly 

carefully - more carefully -  most carefully

properly - more properly -  most properly

badly - worse - worst

hard - harder -  hardest.

Задание 3. 

1) faster 

2) the best

3) badly

4) well

5) most carefully