将左右两部分搭配，使其成为通顺的句子。

①Is she in the study?   A. It's on the desk.

②Is this your bedroom?   B. No, they aren't.

③Where's my pen?    C. No, it isn't.

④Are they on the chair?   D. Yes, she is.

⑤Where are my books?    E. They are on the bed.