1 will be sitting

2 to have been forgotten

3 had I arrived

4 think

5 Have you been running

6 haven't cleaned

7 have had my house painted

8 were

9 to start

10 have been looking- were

11 have passed-began

12 missed- have talked- left

13 has just arrived- is waiting- want

14 coming

15 were sitting

16 made

17 remembering

18 starts- leave

19 passes- has studies

20 were you doing

21 had finished 

22 will have typed

23 had driven

24 has not been delivered

25 had studied

26 rang- were watching

27 is staying- were- could

28 have been working

29 are being used

30 would you have done

31 have never seen