从所给的句子中选出合适的完成对话。

A. Where shall we go? B. When shall we start out? C. May I speak to Sandy, please? D. What can we do there? E. Would you please bring your sports shoes?

W: Hello!

M: Hello! This is Mark.

W: Yes, this is Sandy. Anything new?

M: It's weekend tomorrow. Shall we go for a spring outing?

W: Sounds great!

M: What about the Yellowstone Park? There are the most beautiful Ones this time of the season.

W: Good!

M: Well, we can fish, camp and have a picnic. We'll do a lot of walking, too.

W: Sure.

M: I'll pick you up at about 7 tomorrow morning, OK?

W: OK! See you!