Use the Present Perfect or the Past Simple.

Решение:

1. A: Have you ever crossed the desert in a jeep?
2. B: Yes, I have.
3. A: When did you cross it?
4. B: I crossed it last year.
5. A: (Eva and Mac / ever / see) a crocodile?
6. B: Yes, they have seen it.
7. A: Where did they see it?
8. B: They saw it in Egypt.
9. A: (Mac / ever / climb) a high mountain?
10. B: Yes,
11. A: When did he climb it?
12. B: He climbed it last month.

Ответ: crossed, have, did, cross, crossed, have seen, did, see, saw, did, climb, climbed.