Circle the correct answer: a, b or c

1. Lisa hasn't spoken to Tom yet.
2. I haven't decided what I'll do in my holidays.
3. I haven't washed the car yet.
4. You've read that book, haven't you?
5. The capital of Germany is Berlin, isn't it?
6. I've just seen Kate, but I haven't spoken to her yet.
7. Tony and Sarah have just moved to London, haven't they?
8. You haven't got a new car, have you?