Task 1:

1. Пример - by
2. on
3. in
4. with
5. off
6. in
7. into
8. with
9. on

Task 2:

1. Пример - c
2. a
3. c
4. c
5. a
6. a

Task 3:

1. Пример - Not yet Pam...
2. No I haven't,but i'd like to go.When are you going there?
3. Have you bought the tickets already?
4. Where are you going to stay?
5. Have a nice journey, Pam!