A、One. B、Two. C、Three. D、Four. B题目询问的是具体的数字。根据女士说的“我有两个行李箱”，可知正确答案为B项。

M: Welcome to Britain. [6]May I see your passport and papers, please?
W: Sure, here you are.
M: Thank you. How long do you plan to be here?
W: About six months.
M: Where will you be staying?
W: [7]Mostly in Birmingham, but of course I’ll visit some other places, such as London, Oxford and Cambridge.
M: Fine, [6]now I have to check your luggage.
W: OK, [8]I have two suitcases.
M: What do you have in them?
W: Nothing but personal belongings.
M: All right. Hope you have a nice stay in Britain.
W: Thank you.
6. Where did the conversation most probably take place?
7. In which city will the woman mostly stay?
8. How many pieces of luggage did the woman have?