Complete the story. Use the past simple or past perfect form of the verbs in brackets.

It was Mum's birthday. My sister and I decided to cook dinner as a special surprise. Before we finally _____(agree) on a recipe, we _____(spend) about three hours looking through all of her cookery books for some ideas. When we ____(finish) making a list of everything we needed, we _____(go) to the supermarket to buy the ingredients. We _____(prepare) the meal together and when everything was ready, we _____(put) it in the oven. When it_____(be) in the oven for an hour, we took it out. It looked just the same! It wasn't cooked at all because we____(forgot) to turn on the oven!