1/1. I am writing

2.belongs

3.the place is

4.I think

5.people have

6. we swim

7.we go

8.it rains

9.I hate

10.Sandy has

11.she is eating

12.it smells

13.do you have

2/1.was,was

2.cleaned

3.started, finished

4.wanted

5.how did you do that?

3/1.are going

2.what will you do

3.they will go away

4.she will lend

5.I am going out

4/1.what were you doing when the phone rang?

2.I watched

3.was jane busy, came

4.was studying

5.did the post arrive

6.came, had

7.didn't go.

8.were you driving, stopped

9.was not driving

5/1.have finished

2.have bought

3.has gone

4.have you seen

5.has broken

6/1.wrote

2.did not have

3.played

4.did you go

5.have you ever met

6.has worked

7.was

8.has worked

9.didn't enjoy

7/1.can

2.can

3.can, can't

4.may

5.must

6.need