Ответ:

My best friend and I have known each other since we were at primary school.

The United States has existed for over 200 years.

Josh has had a driving license since he was eighteen.

There has been life on earth for millions of years.

That TV has been on for at least three hours!

He has been in bed with a cold for three days.

She says she hasn't seen a good film since she saw Titanic.

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