Ответ:

1. I stayed in that hotel when I was a child.

2. He's very intelligent. He passed all his exams last year.

3. We have been at this school since we were five years old.

4. Have you tried Japanese food?

5. I saw that Brad Pitt film at Christmas.

6. Did you visit Portugal last July?

Объяснение:

Past Simple используется, есть нам важно время, когда произошло то или иное действие. Если нам важен сам факт произошедшего действия, то нужно время Past Perfect.