Respuesta:
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 am going this weekend, actually.
5 A: Look at mark and james! They are driving from the cliff!
B: Yes, I think they are 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.
