grammar test Past Perfect and Past Perfect Continuous

Mandy was exhausted by the time she went on holiday because she_____________( to work)    over 55 hours a week.

We arrived at work in the morning and found that somebody______ (to broke) into the oficce during the night.

Nick gave up smoking 2 years ago.He( to smoke)_________ for 30 years.

They______ (to play)for two hours when it started to rain.

It wasn't raining when we went out.The sun was shining.But it__________so the ground was wet.

We were good friends. We______________ (to know) each other for years.

My friends____(to eat) that delicious pizza when the waiter brought their bill.

I was so nervous on the plane.It was my first flight.I__________ ( to fly)before.

When he (to finish) ___________ his speech, he waited for the reaction of the audience. But no one said a word.

We (work/already)  _______on this project for a month before we found a fundamental flaw.

She was exhausted because she(work)___________ since eight o'clock that morning

We didn't know what to do because _________ (we,not,listen)to the teacher.