请找出问句中相应的答语，并将其序号写在题前的括号里。

①What's in your bag? ____            A. A music book.

②What colour is your pen?____          B. Sure. Here you are.

③How many books do you have?____     C. Yes, she is.

④May I have a look?____               D. It's purple.

⑤Is she in the living room?____           E.I have eight.