M: Hi, Doris. I hear you are going to the United States next week.

W: So I am.

M: When did you get your passport?

W: I got it last week.

M: How long is it valid?

W: It's valid for 5 years. I am planning to do a doctor’s degree during my stay there.

M: Good. Good luck to you!

W: Thank you very much.

M：你好，Doris。听说你下周要去美国了。

W：是的。

M：你是什么时候办好护照的？

W：上周。

M：护照有效期是多久？

W：有效期是5年，我打算在那儿读一个博士学位。

M：那不错，祝你好运！

W：非常感谢。