Part 3: Fill the blanks with the correct tenses.

1. When I went to the shops, I saw my friend. 2. When I was seen by my friend, I said 'Hello!' 3. While we were talking, a car ran into a man on a bike. 4. When we saw the accident, I was phoning for an ambulance. 5. While I was waiting for the ambulance, a policeman arrived.