Excuse me , Professor , I have a problem and need to leave class early .   Why do you have to leave early ?   I am not feeling well .   Could you make it up by attending my other section this week ?   Yes , it's all taken care of .   Are you leaving right away or can you stay for a few more minutes ?   I can stay a few more minutes .   OK , but please make sure that you get all of your make-up work completed . 