Suppose someone is taking a multiple choice exam and has come across a problem where he/she does not know the right answer.
假设一个人在考选择题，然后遇到了一个他不知道正确答案的问题。
Suppose someone is taking a multiple choice exam and has come across a problem where he/she does not know the right answer.
假设一个人在考选择题，然后遇到了一个他不知道正确答案的问题。
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