1 Is it snowing....

2 Does it often snow......

3 snows

4 It is snowing

5 Will it snow......

6 Did it snow.......

7 Does the sun shine......

8 doesn't rise

9 came

10 refused

11 is sitting

12 pays(paid)

13 will be

14 What are you thinking about?

15 What do you think of that car?

16 skis

17 is skiing

18 Did he ski........

19 will ski

20was skiing

21 didn't ski