—How long will you be staying?
—I don’t know. .
A. That’s OK
B. Never mind
C. It depends
D. It doesn’t matter
网友回答
A. That’s OK
B. Never mind
(答案→)C. It depends
D. It doesn’t matter
解析：交际用语. That’s OK 那好吧;Never mind不要介意;It depends 那要看情况而定;It doesn’t matter没关系.根据题意,你要呆多久?——我不知道。那要看情况而定。故选C。