Нужно подставить вопрос под фразу , ​

1) Do you happen to know when Tommy will be back?

2)I don't suppose you know there are no trains to Oxford,do you?

3)Call me if you need me.

4) Do you know if it's going to take long?

5) Do you have any idea how much longer do I have to wait?

6) Let me know if you can come to my party.