past perfect - negative sentences

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. Note that you will lose points if you ask for hints!
1. Alicia didn't work very hard because she (feel) well the week before.
2. We (change) money before we went on holiday.
3. The waitress brought a drink that we (order).
4. I met a friend who I (see) for a very long time.
5. Tim (be) to a musical before last Sunday.
6. We (buy) a new Blu-ray-Player, so we could spend the money on a new TV.
7. He noticed that she (do) her work properly.
8. I was very tired because I (sleep) enough.
9. He wrote a bad mark in the exam because he (take) notes in the lessons.
10. He was proud of his win because actually he (train) a lot.
11. The caretaker (Hausmeister) (replace) the broken light bulb.
12. Luisa didn't know the song because she (take) part in the rehearsals.
13. We (order) anything there before 2013.
14. They (spot) the fire, so the house burned down.
15. It was cold in the flat because she (turn) on the heating.