A、Four. B、Six. C、Five. D、Seven. B语义理解题。对话中，女士询问男士共几位就餐，男士说6位，故B)“6位”为本题的答案。A)“4位”、C)“5位”、D)“7位”均与对话内容不符，故可排除。

W: ABC Restaurant, can I help you?
M: Hi, could you tell me what time you start serving dinner tonight?
W: Certainly. Dinner is available from 5 o’clock to 10 o’clock.
M: Is it possible for us to make a reservation for 4 o’clock?
W: Sorry, no. Dinner service is not available before five.
M: OK. In that case， I’d like to reserve a table for 5 o’clock.
W: For how many people?
M: Six.
W: May I have your name, please?
M: Sure, I’m Black Smith.
W: Thank you, Mr. Smith. A table for six.
M: By the way, can we have the table by a window?
W: No problem.
6. When does the restaurant begin to serve dinner?
7. How many people are likely to come to the dinner?
8. Where does Mr. Smith prefer to sit in the restaurant?