你在上课前有预习的吗？
上课前检查一下麦克笔。
上课前我们做早操。
我的生物老师怀特先生在上课前五分钟来到了教室。
My biology teacher, Mr. White, came to the classroom five minutes before the class began.
就在上课前，玛丽摔碎了她的眼镜。
课前复习来上课前做的笔记。
Before class, review your notes you have taken before you come to class.
值班生应该在上课前分发练习本。
The student on duty should hand out the exercise books before class.
我必须在上课前匆匆写出一篇学期论文。
最好是在上课前就已经阅读过指定材料。
Ideally, keep up with the readings before you come to class.
我期待你们上课前都准备好了。
他在上课前给我们讲了个非常幽默的故事。
请早几分钟到，你在上课前要填几份表格。
Be here a few minutes early. You need to complete some forms before the class.
我希望你们上课前，阅读这个时已经注意到了。
I hope some of you noticed this when you were reading over this before you came to class.
上课前先做好准备并按时到达课堂。
一天上课前，梅根的父亲找来说想跟我谈谈。
我们应该在上课前把书准备好。
我们在上课前都要向老师鞠躬。
请在上课前调好乐器的音调。
你在上课前和几个朋友闲聊。
我想第二天早点起来到学校，以便上课前完成作业。
I thought I could get up earlier to go to school the next morning so that I could finish my homework before class.
因此，在上课前看完论文是非常重要的！
上课前把笔记复习一下。
请在上课前一天用电子邮件把这些问题发送给教授。
Please email your question to the professor the day before the class.
一天早上上课前我的物理老师走到我的寄物柜前，让我去他教室。
One morning my physics teacher walked up to me at my locker before school and asked me to step inside his classroom.
有时会有同学在早上上课前来找我帮忙解答数学或科学作业的问题。
Other students would sometimes come to me in the morning before school to ask for help with their math or science homework.
有时会有同学在早上上课前来找我帮忙解答数学或科学作业的问题。
Other students would sometimes come to me in the morning before school to ask for help with their math or science homework.
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