Exercise 1.
1F, 2C, 3D, 4E, 5A, 6B
Exercise 2.
1. would have fallen
2. don't change
3. were
4. would have brought
5. don't hurry
6. knew
7. would have enjoyed
8. is
9. would write
Exercise 3.
1. ...you wouldn't miss the turn.
2. ...I will open the door.
3. ...I take my umbrella.