Complete the sentences using the correct form of the verbs in past simple or in past continuous
1. He (wait) for half an hour before they (arrive).
2. Where (he/go) when you (see) him?
3. He (phone) me to say they would be late.
4. She (talk) to John on the phone when I (walk) in.
5. (she/know) they (come) to the party?
6. How many people (sit) in the waiting room when you (arrive)?
7. I (meet) them in the street while I (shop).