I.1 use to

2 used to

3 use to

4 used to

5 use to

6 use to

7 used to

8 used to

9 used to

10 used to

II.1 went

2 had

3 didn't spend

4 was 

5 didn't see

6 was

7 wrote

8 could

III.1 I wish I could stay in bed

2 I wish I got good marks

3 I wish I could lie on a beautiful sunny beach

4 They wish they could go fishing this weekend

IV.1 I wish i had a car

2 I wish I had new shoes

3 I wish I could afford to go on holiday

4 I wish I had time to read lots of books

V.1 send/will come

2 won't understand/whisper

3 won't survive/take

4 press/will save

5 will cross/fly

6 will answer/has

7 touch/won't scream

8 will forget/don't phone

VI.1 studying

2 being

3 should have

4 have

5 gets

6 going