我努力学习，上课认真听老师讲课，课后多做练习。
I worked hard by listening to the teachers carefully in class and doing more exercises after class.
要充分利用课上的时间。上课认真听老师讲课，以后就可以少花力气。
Make good use of your time in class. Listening to what the teacher says in class means less work later.
首先，我上课认真听老师讲课，认真记笔记，课下我复习旧功课，预习新功课。
First, I listen to the teacher and make notes carefully in class. I revise my old lessons and prepare my new lessons after class.
上课说话不好。别说了，认真听老师讲课。
It's not good to talk in class. Stop talking and listen to the teacher carefully.
上课的时候，我认真听老师讲课，积极提问和回答问题。
In the class, I listen carefully to my teacher, and I often ask and answer questions.
课堂上不要听音乐或玩游戏，上课时我们必须认真听老师讲课。
Don't listen to music and play games in class. We must listen to the teacher carefully in class.
课堂上不要听音乐或玩游戏，上课时我们必须认真听老师讲课。
Don't listen to music and play games in class. We must listen to the teacher carefully in class.
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