听力原文：Woman: Can I help you？
Man: Sure. I'd like to book an airline ticket here.
W: Which airlines do you prefer？
M: I don't have any particular airlines in mind. Any one safe, reliable and reasonable is O.K. with me.
W: Where is your destination？
M: (4[C])London.
W: From here？
M: Yes, from Norfolk International to London Heathrow Airport.
W: When would you like to leave？
M: (5IAI)Friday, the coming Friday.
W: There're dozen flights to London. Which do you prefer, morning, afternoon or night flight？
M: Is there any difference in price？
W: Yes. Generally speaking, the night flight is cheaper. Are you taking single or return？
M: Return. I'll be back Monday evening.
W: And economy class？
M: Yes.
W: You'll have our weekend bargain price. It's $480.
M: That's acceptable. Which airlines？
W: The US Air and the British Airways.
M: You mean I'll have to change.
W: Yes, at Dullas Airport, Washington D. C.
M: What time？
W: You leave Norfolk International at 9:55 p.m and Dullas at 11:50 p.m.
M: How long does the trip take？
W: About 5 hours, You'll be there in the morning.
M: That's O.K. with me.
W: Can I have your name please？
M: John Smith.
W: John Smith. Shall I write your tickets now？
M: Wait a minute. How much luggage can I take onto the plane？ I've got some documents and have to take good care of them.
W: It's 5 kilos. You may just take your documents with you and leave the other luggage to the airlines.
M: That's a good idea.
W: You'll return from Heathrow at 6 p. m Monday and arrive at Dullas, 7 p.m. Is that all right？
M: That's perfect. Please make my tickets O.K.
W: Sure. You don't have to have your return ticket confirmed.
M: Do you accept the credit card？
W: (6[B])Yes. Please sign your name here. Thank you. Here you are, credit Card, tickets and receipt.
M: I appreciate it.
W: You're welcome.
where is the man going？

A. Dullas.
B. Norfolk.
C. London.
D. Washington Ｄ.Ｃ.