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)