作为交换，孩子们保证在课堂上完成作业，作好课前准备，并为考试复习功课。
In return, the pupils promise to get their work done in class, to come to school prepared, and to revise for tests.
芝加哥——一项小型研究发现：在开始一天的功课前给青少年多出30分钟的时间可以使他们在课堂上更机敏，有更好的情绪，反应不那么迟缓，而且甚至可以享用更健康的早餐。
CHICAGO - Giving teens 30 extra minutes to start their school day leads to more alertness in class, better moods, less tardiness, and even healthier breakfasts, a small study found.
课前，他从来没有不预习功课的。
我建议你做功课前先复习一下课文，这样你可以避免犯许多错误。
I suggest your reviewing the texts before you do the exercises. In this way you can avoid making many mistakes.
那个懒惰的男孩去课前他准备了他的功课。
That lazy boy went to class before he had prepared his lesson.
课前预习功课是每位高中学生必须做的。
It's required for every high school students to preview the lessons before class.
课前预习新功课，找出问题，然后在课上认真听。
Before class I prepare new lessons to find out the questions. Then I will listen carefully in class.
苏珊忘了做功课，所以得赶紧在上课前写完。
Susan forgot to do her homework and had to scramble to finish it before class.
苏珊忘了做功课，所以得赶紧在上课前写完。
Susan forgot to do her homework and had to scramble to finish it before class.
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