Помогите составить предложения с when, чтобы в первой части было Past Simple а после when Past Continuous

Ответ:

1. I was studying for my exams when my friend called me.

2. She was cooking dinner when the power went out.

3. They were playing basketball when it started raining.

4. He was reading a book when his phone rang.

5. The teacher was explaining the lesson when the fire alarm went off.