题干
― I'm afraid I have to give it up.
― Don't be discouraged. Remember ______ sticks to his work will succeed one day.
A：those who
B：who
C：whoever
D：whomever
答案(点此获取答案解析）
C
是公差不为0的等差数列，
是等比数列，且
，
，
，那么（ ）