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. Could you tell me where the doctor's office. is?
B: Yes, it's on the second floor, beside the escalator.
A: Mm. First I need to buy a book. 1 ?
B: Yes, there is.YOLI can find Bible Books on the fourth floor. 2 the elevator.
A: Oh, I also need to exchange some money.
B: Yes. There is a 3 on the first floor. It's right behind you.
A: Good. I think that's everything. Oh no. There is one more place I need to go to.
B: Yes?
A: 4 where I can buy some shampoo?
B: Yes, there's a drugstore on the third floor.
A: 5 . You've been very helpful.
B: You're welcome.
