题目内容：

根据对话内容，从方框内的选项中选出能填入空白处的最佳选项，其中有两个为多余选项。

John：Hi，Li Lei! What are you going to do for your summer vacation?

Li Lei：I'm going to Switzerland to study.

John：1.

Li Lei：For a month.This is my first time to go abroad，so I feel a little nervous.

John：2.

Li Lei：Because I don't know what I should do or not do.

John：3. Let me tell you something about it.First，don't be late! Being on time is very important.

Li Lei：I know their watches are very famous.And next?

John：Oh，and you can never visit others without calling.

Li Lei：4. That's quite different.In our country，we don't have to call first.Thank you.

John：5.

A．Thank you very much.

B．I see.

C．It's my pleasure.

D．I like this place.

E．Don't worry.

F．Why are you nervous?

G．How long will you stay there?