Change the verb into the correct form:
1. Dan (leave) very early today.
2. Sam and Sue (buy) a new house last month.
3. I (visit) Germany the previous week.
4. You (play) very well.
5. They (find) this book on their trip to Italy.
6. I (bake) this cake by myself.
7. We (open) the store in 1987.
8. The rain finally (stop), and we (go) home.
9. She (plan) to come, but she (have) some problems.
10. Kate (have) a big house, but she (sell) it.
11. Rose (be) very thin.
12. You (be) at work yesterday morning.
13. We (think) New York was in England!
14. They (bring) this from their trip.
15. She always (dance) in the summer.