One day, when we were having a math exam, I heard Wang Ping who was behind me asking me for the key to a problem. The teacher was in the front of the classroom and I was not sure about my solution, so I didn't answer him. After the exam, he went out with other friends without saying anything to me.
一天，当我们乒在进行数学考试时，我．听见后边的王平跟我要一道题的答案。老师在教室前面，而且我对自己的答案没有把握，所以我没有回答他。考试之后，他什么也没说，就和其他朋友出去了。
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