I think bad manners for living with your roommate that should be avoided. Because it is cause of problem in society. For example, when you stay with your roommate. Something you shouldn't do is opening the music loud when your roommate stay in your room because your roommate will annoy and she can’t make homework or read the book. Because there are not concentrate. If you are opening the music. You should use small talk. Another example, you shouldn’t pick up something before get the permission of hers because something is important for hers. Moreover, If you pick up something but your roommate unwilling give us. So, you must get permission from your roommate before you take away. From the above example, everyone should avoid bad manners and I hope everyone don’t make such behavior. Because if everyone does not have a bad effect on society. Everyone can coexist happily in the society.