B Complete the sentences using the words in brackets in the correct form and position.

1. He can't find his keys. I think he's lost them.
2. Haven't you done your homework already yet?
3. It's midnight and she hasn't come home yet.
4. Have you had lunch yet?
5. This is terrible. Someone has stolen my bike.
6. We have just bought a really cheap car!
7. Take your boots off before you come in. I have just cleaned the carpets.
8. Have you phoned the doctor yet?
9. They have already seen the film.