Відповідь:

Кращу відповідь будьласка

Пояснення:

1. How long have you lived in your house? I've lived there for 3 months/I've lived here for a couple of years

2. How long have you known your best friend? We've been friends for 5 years/I've known him for a lot of time

3. How long are you at this school? I arrived here a couple of weeks ago/I've been studying here for a month now

4. How long have you had a mobile phone? Since I was 9/For 3 years now