单项选择题
A．he is a lazy person B．he refuses to follow his own energy cycle C．he is not sure when his energy is low D．he is at his peak in the afternoon or evening
A．their academic performance will affect their future careers B．they are heavily involved in student affairs C．they have to observe university discipline D．they want to run for positions of authority
A．to live in a different university B．to take a particular course in a different university C．to live at home and drive to classes D．to get two degrees from two different universities