A、1.5 kilos. B、5 kilos. C、10 kilos. D、35 kilos. A细节题。对话中提到It weighs 31．5 kilos，still 1．5 kilos overweight，故选A。B，C，D均和原文不符。

M: Miss, may I have a look at your ticket, vaccination certificate and passport?
W: Certainly. Here you are.
M: Would you like to check any luggage?
W: Yes, I’d like to check two pieces.
M: Could you put your luggage on the scales, please?
W: OK.
M: I’m afraid your luggage is overweight.
W: How much luggage do you allow free of charge on board?
M: As a rule, the free luggage allowance for an average passenger is 20 kilos. Now your luggage is 35 kilos. I’m afraid you have to pay an excess luggage charge.
W: What’s the overweight charge per kilo?
M: Twenty dollars.
W: Oh, it’s very expensive. I’m told a passenger with a Student Visa enjoys 10 kilogrammes’ privilege.
M: You’re right. But now your luggage is 35 kilos, 5 kilos overweight.
W: Is it possible for me to take something out from the luggage and put it into my handbag?
M: What’s inside your case?
W: Most of them are books and dictionaries.
M: I think you can do that.
W:(after a while)May I put my luggage on the scales again?
M: Yes, please. It weighs 31.5 kilos, still 1.5 kilos overweight. But I’ll let you go.
W: That’s very kind of you.
M: Here’s your ticket, boarding pass, vaccination certificate and passport. Please go to Gate 8 for boarding. Have a pleasant flight.
W: Thank you.
Question 6
What is the girl supposed to have before boarding?
(pause: 10 seconds)
Question 7
How much is the free luggage allowance for an average passenger?
(pause: 10 seconds)
Question 8
What is the girl?
(pause: 10 seconds)
Question 9
How much is the girl’s luggage overweight after she takes something out?
(pause: 10 seconds)
Question 10
How much does the girl pay for her excess luggage?