Past perfect/past perfect continuous

Molly used to ... watching cartoons when she was young.

George never ... eat vegetables when he was a teenager.

I ... the ambulance siren wailing as I was walking through the city centre.

Mary ... the house by the time it started to rain.

First, he had dinner, then he ... the newspaper.

The Smiths ... abroad for fifteen years before they moved back to England.

Peter was listening to his favourite CD when Paul ...

I think History is less interesting ... Geography.

Valerie was making the beds while Mark ... the floor.

Brain isn't as ... as Richard.

Jessica is ... than Susan.

Had you ... to San Francisco before?

She ... a book all night and was very sleepy the next morning.

My grandfather often ... old films.

Maria entered the room very quietly ... she didn't want to wake anyone up.