Объяснение:
1 задание.
6.have been
7.for
8.have already met
9. have only known
10. for
11. had studied
12. for
13. never had
14. have never had
15.for
16. didn't feel
2 задание
2.My mum has had this watch since she was forty.
3. I Have known my best friend for two years.
4.I haven't bought any new trainers since last Christmas.
5.I Have been in this Englisch class for Three months.
6.I haven't eaten anything since 7a.m.
