根据对话内容，在空白处填写一个适当的话语（话语可能是一个句子，也可能是一个短语或一个词），使对话完整。

A: Excuse me,  1. _   _  _ around here?

B: Go straight ahead, and 2.             the escalator to the second floor.  You'll find it.

A: Thank you very much.

   (On the second  floor )

C:  What can I do for you?

A: Yes, I want to buy a book.

C: Please look at the latest book.  3. _     __ by Fang Wenshan.

A:  I know him.  He wrote many beautiful lyrics for Jay Zhou. And 4.           ?

C: It's 35 yuan.

A:  OK,  I think it must be worth the price.  I'll take it,  but I only have dollars.  Do you know where I can 5.______  ?

C:  Oh,  look! The bank is over there.

A: Thank you.  Wait me a moment! I'll be back soon.

C: OK, see you later.

A: See you.

我国科技发展总体要求力争在有相对优势的部分领域( )。

A．跟进世界先进水平，缩小差距
B．达到世界先进水平
C．超过世界先进水平，实现跨越式发展
D．实现产业化