simple past or present perfect

Gap-fill exercise

Put the verbs (in brackets) into the simple past or the present perfect.
1. We (already - help) them.
2. We (help) them when they had problems.
3. (he - arrive) When ?
4. (he - arrive) yet?
5. I (play) with football stars in my life.
6. I (play) with toys during my childhood.
7. She (not receive) a letter last week.
8. She (not receive) a letter so far.