Student should be allowed to wear their own clothes.
学生们应该被允许穿自己的衣服.(而不是校服)
We should use our head at class.
我们在上课时要多动脑筋
Teens should study hard for the Zhong Hua people.
青少年应为
中华民族而努力读书
Students who can't speak English well should practice English as much as possible.
英语说不好的学生应尽可能多得练习说英语
We should't talk to people who are reading because that's not polite.
我们不应该和正在读书得人说话因为那是不礼貌的