单选题 Salesperson: Can I help you, sir? Customer: Yes, I bought this watch from you last week and I've been having a few problems with it. Salesperson: ______ Customer: When I bought this you said it was waterproof, but when I wore it in the swimming pool it filled with water.

A、 That's impossible.
B、 I'm sure it's all right.
C、 Did you buy it here?
D、 What's the trouble?

【正确答案】 D

【答案解析】空格前顾客提到表是在这里买的，但在使用过程中出现了一些问题，空格后又具体描述了问题的所在，可推断空格处售货员是在问他遇到了什么问题。