根据对话内容及方框中所给的句子补全对话。其中有一项是多余的。

A: Hello, Susan!

B:

A: Is my computer game on the table?

B: No, it isn't. It's on the bookcase.

A: Oh, OK. Are they on the bookcase, too?

B: Let me have a look. They're on the chair.

A: So, where is my pencil case?

B:

A: Where's my backpack?

B: It's under the table. And your baseball is under the chair.

A: Good.

B: The keys? They're on the table.

A. Hello, Bill! B. They are red. C. No, they aren't. D. It's under the sofa. E. How about my books? F. And where are mom's keys?