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 CUNY.
Please, let's not go there. I've been there before, and believe me, it's not fun for any of us.