1 a: Did you do anything last night?
b: I went to the gym and I had just arrived home when Michael called me. He said that he had been trying to call me for ten minutes before I finally picked up the phone.
2 a: Did you catch any fish on your fishing trip today?
b: Yes. I had been sitting in the boat for two hours when I caught a huge fish.
3 a: Did you like yesterday's open-air concert?
b: The music was good, but the weather was terrible. The concert had just started, when suddenly it started raining. The musicians had only been playing for ten minutes.
a: What a shame!
4 a: Was the house cleaned when you got home?
b: Yes, the children had been wiping dust from the furniture and they had cleaned all their toys.
5 a: Why were you so upset this morning?
b: Well, I had been cleaning the house for several hours when the children came in with dirty shoes.
6 a: Why are you so late for work this morning?
b: I'm sorry. I had been waiting for the train for over an hour before it finally arrived.
