Simple past vs past progressive when

She ___ a book when the phone rang

• was reading

• read

My son ___ a coin when he was walking

• found

• was finding

She ___ her hair when the postman came

• was doing

• did

When they ___ we were waiting for the bus.

• arrived

• were arriving

The mixer ___ down when I was cooking dinner.

• broke

• was breaking

They ___that we were watching them.

• noticed

• were noticing

The teacher ___ angry

because we were talking

• was being

• was

The boys ___ because it was raining

• weren't playing

• didn't play

I ___ him when he was eating the cakes.

• was seeing

• saw

When the light ____ out, I was having a bath.

• went

• were going