Choose the correct alternative.

1. Have you spent/did you spend your pay yet?
2. He still hasn't found/didn't find a job.
3. Did he go/Has he gone yesterday?
4. Who did you see/have you seen last night?
5. I've already given/gave you £20. That's enough!
6. A: You look very smart. B: I've just had/just had a job interview.
7. I haven't done/didn't do the shopping yet.
8. We went/'ve been to Africa three years ago.