21. Tiffany: I'd like to get a part-time job this semester since tuition's gone up so much. Angela: That makes sense. Did you discuss it with your parents? Tiffany: Yes, I did. They told me not to work too many hours a day. Angela: I can't agree with them more. _______________(A) They'd prefer you not to study.(B) Above all, we should work hard.(C) They'd like you to work long hours.(D) After all, we're here to go to school.