请从方框中选出合适的选项补全对话。其中有一项是多余的。

A. What are you doing now? B. We can take the bus there. C. About 40 minutes. D. Can you ride the bike? E. Do you want to come? F. Why do you want to see them?

(Celina is calling her best friend Betty.)

Celina: Hello! This is Celina.

Betty: Hi, Celina. This is Betty.

Celina: .

Betty: Nothing much. I'm just watching TV.

Celina: I want to go to Taiyuan Zo0o this Sunday.

Betty: Sounds interesting. What animals do you want to see?

Celina: Elephants.

Betty: .

Celina: Because they are smart and friendly. And there is an elephant show, too.

Betty: Great! How can we get to the zoo?

Celina: .

Betty: How long does it take?

Celina: It's kind of far. .

Betty: Wow, that's a long time. How about meeting at the bus stop at 7:30?

Celina: OK, see you then.

Betty: See you.