为了改善住房条件，小亮的父母考察了某小区的A,B两套楼房，A套楼房在第3层楼，B套楼房在第5层楼，B套楼房的面积比A套楼房的面积大24平方米，两套楼房的房价相同，第3层楼和第5层楼的房价分别是平均价的1.1倍和0.9倍．为了计算两套楼房的面积，小亮设A套楼房的面积为x平方米，B套楼房的面积为y平方米，根据以上信息列出了下列方程组．其中正确的是（   ）．

⑴Which dress is yours?____            A. Of course.

⑵What do you want?____               B. Yellow and black.

⑶How old is Peter?____                  C. I want a blue sweater

⑷What colour is your bag?____      D. The most beautiful one.

⑸May I use your book?____            E. He is twelve years old.