Verified answer

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.