题目内容：

请阅读下面的对话，根据对话内容补上所缺句子，使对话通顺、合理、意思完整

A: Excuse me. Do you need any help?

B:1.Could you tell me how to use the machine?

A: Certainly. First, put a ten-yuan note into the machine. Then look at the screen, choose the station where you will get off and click. Finally, the ticket machine will give your change by itself.

B: Thank you. Let me have a try.2.

A: Right. Where are you going? Then find the station name on the screen.

B: The Science Museum Station.

A: Click it. Then take the ticket and your change. Remember to get on Line2 to the south.

B: OK.3.

A: The subways come about every 3 minutes. You can wait there for a moment.

B: 4.

A: Three stations from here.

B: 5.Thanks for you help.

A.How often do the subways come?

B.This ticket is for you.

C.Put the note into the machine.

D.OK, I got it.

E.Yes. I need your help.

F.I'll have a good time.

G.How far is the Science Museum Station from here?