用 you mustn't 写六条班规应该是用 you mustn't in the classroom写三条班规和用 you must 写三条

用 you mustn't 写六条班规应该是用 you mustn't in the classroom写三条班规和用 you must 写三条
用 you mustn't 写六条班规
应该是用 you mustn't in the classroom写三条班规和用 you must 写三条

用 you mustn't 写六条班规应该是用 you mustn't in the classroom写三条班规和用 you must 写三条
you mustn't eat in class
you mustn't talk while having classes
you mustn't fight with classmates
you must finish your homework
you must listen to teacher carefully
you must be polite to your classmates