Don't sleep in class

班里───Class;睡觉───sleep

The teacher told the children to stop chattering in class.───老师叫孩子们在课堂上不要叽叽喳喳讲话.

Each class has a register of 50 students.───每班注册有50个学生.

Party activists with lower middle class pedigrees are numerous.───党的激进分子中有很多出身于中产阶级下层.

He is always at the bottom of the class.───他的成绩在班上总是排在最末.

The house she has just bought is no class.───她刚买的房子是低劣品.

Please fit the machine up for this afternoon's class.───请为今天下午的课准备好机器.

The class separated into several smaller groups to talk about the subject.───这个班的学生分成了几个小组讨论这个问题.

He's out and away the cleverest boy in our class.───他绝对是我们班上最聪明的学生.

She was in a class of thirty members.

Officers are entitled to travel first class.

Class differences can divide a nation.

He will take over Class 9801 next week.

In biology class we had to dissect a frog.