1) The wind was blowing when we were in the open sea.
2) She was watching the children play.
3) They were leaving when she arrived.
4) I was travelling abroad when I got his letter.
5) She was driving when she saw me in the street.
6) It was raining all the evening yesterday.
7) When I entered the classroom, everybody was sitting at the desks.
8) My friend was working at 1 o’clock yesterday.
9) We were having breakfast when the postman came.
10) Mary was getting ready for the exam while I was reading.