Ответ:
1. A: You look tired, Tom.
B: Yes, I have been hiking all day.
2. A: Have you ever had a bad accident?
B: Yes, I once tripped on a rock and broke my arm.
3. A: What have you done to your finger, Jane? It looks swollen.
B: I slammed a door on it yesterday morning.
4. A: How often do you go mountain climbing, Sam?
B: I go about once a month. I'm going this weekend, actually.
5. A: Look at Mark and James! They're diving from the cliff!
B: Yes, I think they're enjoying themselves!
6. A: What were you doing when the earthquake happened?
B: I was doing my homework while Tim and Sally were watching TV.