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EX 4. Give the correct forms of verbs in past simple, past continuous or past perfect.

1. When the police (arrive) ____________?
2. While we (do) ____________ a sight-seeing tour, our friends (lie) ____________ on the beach.
3. They (eat) ____________ everything by the time they (arrive) ____________ at the party.
4. While Tom (play) ____________ the piano, his mother (do) ____________ the washing-up.
5. I (go) ____________ after they (finish) ____________ dinner.
6. The light went out while I (have) ____________ dinner.
7. He (do) ____________ nothing before he (see) ____________ me.
8. When they (get) ____________ the station, the train (leave) ____________.
9. The house (catch) ____________ fire while they were sleeping.
10. While Tom was reading, Amely (watch) ____________ a documentary on TV.
11. The burglar (open) ____________ the safe when he (hear) ____________ footsteps. He immediately (put) ____________ out his torch and (crawl) ____________ under the bed.
12. Last night I (drop) ____________ a plate when I (do) ____________ the washing-up. Fortunately, it (not/break) ____________.
13. Mary and I (dance) ____________ in the house when the telephone ____________.
14. I (open) ____________ the letter when the wind (blow) ____________ it out of my hand.
15. The boy fell and hurt himself while he (ride) ____________ a bicycle.