从方框中选择适当的句子补全对话。

A. How can I get there? B. Thanks a lot. C. Is there a bookstore near here? D. Where is it? E. Can you help me, please?

Sarah: Excuse me, sir.  

Alex: Sure.

Srah:

Alex: Yes, there is.

Srah:  

Alex: It's near the park.

Sarah:  

Alex: You can go there on foot(步行). It's not far. Go straight. Turn left at the second crossing. You will see it.

Sarah:

Alex: You're welcome.