1- is snowing
2- had
3- was reading; heard
4- has already started
5- run; have found
6- was writing; were filling
7- boils
8- what is Peter doing; is having
9- went
10- have you ever written; wrote
11- was waiting; saw
12- works
13- have you done
14- had
15-got
16- is repairing
17- do you speak
18-is; left
19-was, had never flown
20- do you play; play
Объяснение:
