Change the verb into the correct form:
1. By the time you (return) home, you (spend) much time in Africa.
2. She (eat) a lot before the dessert (arrive).
3. He (talk) on the phone before his wife (arrive).
4. We (chose) a date before they (call).
5. Natalie (feed) the baby by the time she (leave) the house.
6. You (finish) your work before you (leave) the office.
7. By the time they (finish) drinking they (drink) too much.
8. I (be) 2 years in Scotland by the time she (arrive).
9. They (study) in the University for 5 years by the time they (get) a degree.
10. I (finish) all the dishes by 7 o'clock.
11. You (forget) about me by then.
12. When you (arrive), the bus (leave).
13. When she (wake) up, he (go) to work.
14. We (speak) with him when we (leave).
15. I (pack) everything when they (come) to pick me up.