Past Perfect Continuous Tense

They had been ___ cartoons for two hours before their mother came.

He ___ running for an hour before he went to work.

Ben had ___ for six hours when his father woke him.

Susan ___ tennis for 5 years before she won the World Championship.

He had been playing computer games since 2 o'clock before his mother ___ his room.

We ___ dancing at the party for hours by that time.

We weren't tired yesterday. We ___ all day long.

Had you ___ up for half an hour when your friends came to see you?

___ waiting for fifteen minutes before his girlfriend came?

How long had you ___ the newspaper before breakfast?

We ___ for twenty minutes when we ___ him in the park.

What ___ doing for the week before the session ___?