The work you hand in must be strictly your own.
If I start to suspect that you are not doing your own work, I will ask you to come see me so that we can discuss the matter. If you cannot convince me that my suspicions are unwarranted, then I may have to send your case to a disciplinary committee that has the right to expel you from Brooklyn College.
Please, let's not go there. I've been there before, and believe me, it's not fun for any of us.