补全对话

A. I can read and do my homework here. B. Now it becomes clean and tidy. C. Thank you. D. What a mess! E. Could you help me put them on the shelf?

Ben: Hi, Alice. Welcome to my new home.

Alice: Hi, Ben. Your new home is big and nice. I like it very much.

Ben:  I like my study best. It's quiet. Let me take you to have a look.

Alice:  Whose books are on the floor?

Ben: Sorry, Alice. They are mine and my brother's. .

Alice: Sure! Let's tidy up your study together.

……

Ben:  Thank you for your help.

Alice: You're welcome, Ben.