Past perfect and past simple

Choose the correct forms.

Example: Our clothes *had been / were* wet because it had rained/ rained.

1. I *hadn’t left / didn’t leave* England until I *had gone / went* to Spain last year.

2. The teacher *had been / was* angry because Kate *hadn’t done / didn’t do* her homework.

3. When I *had got / got* on the bus, I discovered that I *forgot / had forgotten* my money.

4. The school *had been / was* quiet because all the students *had gone / went* home.​