5. haven't arrived
6. Has / had
7. haven't flown
8. Has / called / hasn't
9. Have / written
10. haven't found
11. Have / decided
12. Has / read
13. Have / put
14. hasn't rained
15. have forgotten
Resposta:
5 haven't arrived
6 hasn't ... had
7 haven't flown
8 hasn't he called ... he hasn't
9 haven't ... written
10 have not found
11 haven't you decided
12 haven't ... read
13 haven't ... put
14 hasn't rained
15 i haven't forgotten
