(2012·陕西)—The trip shouldn't take more than an hour.
— .It is at least two hours.
A. I guess so
B. That's it
C. You must be joking
D. It depends
网友回答
A. I guess so
B. That's it
(答案→)C. You must be joking
D. It depends
解析：句意：——这次旅行不应该超过一个小时。——开玩笑，至少需要两个小时。You must be joking.“你一定是在开玩笑”，符合语境。I guess so.“我想是吧”；That's it.“就是这样”；It depends.“看情况而定”。