Complete the sentences.

1. I haven't listened to their new CD ... . Is it any good?
2. We've been waiting for you ... over an hour. Where have you been?
3. Have you ... been to the UK before?
4. I'm afraid we've ... made plans for this weekend, so we won't be free.
5. Pedro has been having English lessons ... he was five years old.
6. It's strange that you mention the film "Avatar". I've ... been reading about it in the newspaper.
7. I've ... heard of a 'sudoku'. What is it?