1.
Policeman: What (you, do) when the accident (happen)?
Martin: I (be) at the bus-stop. I (wait) for a bus.
Policeman: (you, see) how it (happen)?
Martin: No, because I (read) the timetable.

2.
Mary: I (phone) you at 8 o'clock yesterday but you (be, not) there!
Nicole: Well, I (sit) in a resaurant, (have) dinner with Martin.
Mary: (be) Carol with you, too?
Nicole: No, she (stay) at home.
Mary: Where (you, go) after dinner?
Nicole: I (go) home.

3.
Eddie: There (be) an accident outside my house yesterday.
Norma: What (happen)?
Eddie: I don't know. It (rain) and the drivers (go) too fast.
Norma: Was anybody hurt?
Eddie: One man (break) his arm and the other man (cut) his head.