Ответ:
3
2My parents've taught at different schools around the world.
3They haven't given any money to charity.
4I haven't heard this song before.
5Mike's run two marathons this year.
6You've made a terrible mistake.
7My sister's met several famous actors.
8We haven't had a reply from him
4
2 I've written a story for my homework.
3 I've known Sara for ten years.
4 She hasn't gone to the USA.
5 We've broken the phone.
6 They haven't won any football matches.
7 He's ridden a horse.
8 Sfe hasn't met my brother.
вроде так)