单选题
Customer: ______if you'd serve me as quickly as possible as I've got an appointment at two fifteen.
Waiter: I'll do my best, Madam.
A、
It would be very kind of you
B、
It would be very helpful
C、
I'd be most delightful
D、
I'd be most grateful
【正确答案】
D
【答案解析】
[注释] 选项A和B是针对别人特意帮忙而言，而本对话里服务员提供服务乃分内之事。C项语义不当；D项符合对话语境。
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