Σε τι χρόνο είναι οι παρακάτω προτάσεις; Past Simple ή Past Continuous?

1. They arrived at the station half an hour ago. Past ContinuousPast Simple
2. Mr Brown was working in his office at half past ten. Past ContinuousPast Simple
3. They were travelling to Athens at three o' clock in the morning. Past ContinuousPast Simple
4. The dog bit him last Friday. Past ContinuousPast Simple
5. She gave me the money two days ago. Past ContinuousPast Simple
6. What were you doing at seven o' clock in the morning? Past ContinuousPast Simple
7. I didn't invite her to my party last Saturday. Past ContinuousPast Simple
8. Where did you find the money? Past ContinuousPast Simple
9. Why didn't you tell me about the accident? Past ContinuousPast Simple
10. Why was the baby crying at four o' clock in the morning? Past ContinuousPast Simple