课外

Most of the students in the class took an active part in extracurricular.

班绝大部分学生积极参加课外活动。

I got bogged down by the difficult homework.

课外作业把住了。

Too many extracurricular activities take up too much of our precious time for study.

课外活动太多,占去了很多宝贵的学习时间。