根据对话内容，将方框内符合对话情景的句子及序号抄写在对话空白处，使对话恢复完整，选项中有一项是多余的。
Tom: Hello, Sally!
Sally: Yes?
Tom:            
Sally: No, it isn’t. It’s on the TV set.
Tom: OK.           
Sally:                       You can ask Lily.
Tom: Thank you!             
Lily: It’s on the chair.
Tom: Yes. Oh, where are my keys?
Lily:            

A．You’re welcome.

B．The keys? They are under the dresser.

C．Sorry, I don’t know.

D．Is my clock on the table?

E. How about my math book? Is it on the TV set, too?
F. Where is my math book?