1. A: Jack looked so sad yesterday.
B: Yes, I know. Someone had just stolen
his bike.
2: A: Did they find the man guilty
yesterday?
B: No, the police hadn't collected
enough evidence against him.
3. A: I saw your dad on TV last night. He
was a great detective!
B: Yes, he had been working for the
police for 25 years before he retired.
4. A: Did the police arrive soon?
B: Actually, no. We had been waiting for
half an hour before they turned up.