问题补充：
-- My friends always get better grades than I do. What should I do?
--
A. Maybe you should be more friendly to the teachers
B. Maybe you should have a rest.
C. Maybe you should work harder.
D. Maybe you should have a drink.
答案：
A. Maybe you should be more friendly to the teachers
B. Maybe you should have a rest.
(答案→)C. Maybe you should work harder.
D. Maybe you should have a drink.
解析：Maybe you should be more friendly to the teachers也许你该对老师更有好一点；Maybe you should have a rest.也许你该休息一下；Maybe you should work harder.也许你该工作更努力点；Maybe you should have a drink.也许你该喝一杯。根据上文，我的朋友总是比我取得更好的成绩。我该怎么做？结合语境可知选C。
