Change the sentences, as in the example.

1. I don't need a pencil, I need a pen.
It's not a pencil I need, it's a pen.
2. I don't like carrots, I like potatoes.
3. He's not eating sweets, he's eating fruit.
4. We didn't watch a film, we watched a play.
5. I don't speak French, I speak German.
6. They don't want a house, they want a flat.
7. I didn't break a window, I broke a mirror.