【正确答案】
C
【答案解析】[解析] 47-49
M: What a delicious meal! Waitress, can I have the bill? I'm afraid I haven't brought enough cash with me.
Do you honor credit cards?
W: Here it is, sir. Your bill totals 100 dollars. You can use two kinds of credit cards, American Express and State Express.
M: That is fine. I have the American Express. Here is 15 dollars; that's my tip for you.
W: Thank you very much, sir.