1 did you discuss
2 have seen
3 entered, saw, was standing ... and cutting, was cooking
4 heard, ran, saw, was lying... and crying. What has happened? Why are you crying? Have you hurt yourself?
5 went
6 have been
7 came, had, read, began
8 When did your friend return from the south? - She returned yesterday. - Did you go to the station to meet her? - No, I didn't, I was too busy.
9 Has your brother returned, he came
10 Have you been to the Crimea? When were you there? - I was there in 2005.