Помогите с заданием с глаголами в английском!Срочно!!!!!!!!!!!!

1-Is it snowing
2-Does it often snow
3-snows
4-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-paid
13-will be
14-are you thinking
15-do you think
16-skis
17-is skiing
18-Did he ski
19-We'll ski
20-was skiing
21-didn't ski