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.
