Ответ:
1) hasn't seen
2) has she phoned
3) Have the Millers arrived
4) hasn't gone
5) Have they ever been
6) hasn't repaired
7)have you dropped
8)have bought
9) Has Toby found
10)haven't forgotten
11) have never seen
12)have known
Объяснение:
В Present perfect используется глагол Have/Has + 3 форма глагола (V3)
Ответы вроде все верные. Удачи!;)