Номер 8!
Решите пожалуйста! Я не понимаю
Продолжение:
9. I just (to finish) my work
20. Doris (not to play) the piano yet

Ответ:

1.they have never been

2.have already seen

3.has translated

4.have never lived

5.have sent

6.have read

7.has never been

8.hasn't come

9.have just finished

10.hasn't played