根据对话内容，在横线上填写恰当的句子，使对话完整准确。

A: Excuse me, where is the nearest hospital?

B: 小题1:    . You'd better ask the policeman over there. He may know.

A: 小题2:    . (Go to the policeman)

A: Excuse me, which is the way to the nearest hospital?

C: Go down this street, turn left and walk on until you reach the end. And you will see the hospital. It’s between the post office and the fruit shop. You can’t miss it.

A: 小题3:    ?

C: It’s about thirty minutes，walk.

A. It，s too far away from here. 小题4:  ?

C: Yes, you can go there by bus. The bus stop is over there, on the other side of the road. A: I see. Thank you very much.

C:小题5: .

离心泵把机械能传给液体的主要部件是（）。

A、轴

B、联轴器

C、叶轮

D、泵壳