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Li Lei：
Look at the boy at the school gate. Who's that？
你看学校门口那个男孩，他是谁？
Wang Fei：
Oh, that's Liu Jia, our monitor.
噢，那是刘佳，我们班长。
Li Lei：
He is also in charge of the Students' Union, isn't he?
他还负责学生会工作，对吧。
Wang Fei：
Yes, he's active in everything.
对，他什么事情都很积极。