Упражнение на to be в Present Perfect Simple

It ___ cold for a week.

He ___ a waiter for three months.

We ___ in the theatre for an hour.

She ___ happy all her life.

I ___ at the bus stop for ten minutes.

My parents ___ busy this evening.

John ___ a sailor for fifteen years.

You ___ kind to me.

I ___ at school for two hours.

It ___ foggy all day.