句子补妆：根据上下文，选择恰当的选项补全对话，使对话完整。

A.What's in it?
B.May I have a look?
C.What colour is it?
D.How much is it?
E.Where is it?
A: Hello, I have a schoolbag.
B: 1_________________________________________
A: It's blue.
B: 2_________________________________________
A: It's on the chair.
B: 3_________________________________________
A: Two pencil-cases, a ruler and many books.
B: 4_________________________________________
A: 15 yuan.
A: 5_________________________________________
B: Sure. Here you are.