补全对话(选择)。

A: Hi, Kate.

B: Hi, Bob. ____ She is from China.

A: Nice to meet you, Lin Lin.

C: ____

A: What are you doing on the computer?

B: ____

A: Are your parents in China now, Lin Lin?

C: Yes. They are in Beijing. ____

A: Sure. Why not talk to them on the Internet, Lin Lin?

C: No, Bob. ____ They're sleeping.

A: Oh, I see.

A. Do you know Beijing, Bob?

B. Oh, this is my friend, Lin Lin.

C. It's about 11:30 p.m. in Beijing now.

D. Nice to meet you too, Bob.

E. We're sending email to Lin Lin's parents.

F. I like Beijing very much.

G. How are you?

一个扇形的圆心角为120°，半径为3，则这个扇形的面积为（　　）