You should listen carefully in class
上课时───In class;认真───earnest
She was all ears in class.───她全神贯注地听课.
Do you usually take notes in class with a pen or pencil?───你在课堂上记笔记通常用钢笔还是铅笔?
He was unruly in class and made an enemy of most of his teachers.───他因上课调皮捣蛋而成为大多数老师的眼中钉。
At first he was a little shy in class, but now he acts more natural.───他起初在班里有点害羞, 不过现在自然多了.
She was admonished for chewing gum in class.───她在课堂上嚼口香糖，受到了告诫。
You can skip the next chapter if you have covered the topic in class.───下一章，你要是在课堂上已经讲到了，就可以跳过去。
The students are listening to their teacher in class.───学生们正在课堂上听老师讲课.
We did a French dictation in class.
She keeps good discipline in class.
I hate it when Jane cuts up in class.
The professor will give a demonstration in class.
The teacher told the children to stop chattering in class.