Task 1:

1, visited; were having

2, wrote; haven’t received

3, doesn’t snow

4, were waiting

5, are taking

6, was having; rang

7, haven’t finished

8, are written

9, was surfing

10, have lived

11, don’t save; will be

12, was cooking

13, goes

14, are playing; Did you go

15, give

16, bring

17, has taken

18, would arrive

19, decide

20, said; hasn’t phoned

21, was repairing

22, will be repaired

23, saw; sleeping

24, is lying

25, were

26, are learning

27, was destroyed

28, came; were having

29, would not spend

30, repaired

31, was watching