问题补充：
— You know what? I am going to Shanghai on a free trip this weekend.
— .
A. You must have been cheated.
B. It is none of my business.
C. Good for you!
D. So what?
答案：
A. You must have been cheated.
B. It is none of my business.
(答案→)C. Good for you!
D. So what?
解析：句意:--你知道吗？本周末我将去上海进行一次免费旅行。--好事。You must have been cheated.你一定被骗了；It is none of my business不管你的事；Good for you!好事；So what?那又怎样？根据句意故选C。
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