问题补充：
As students, we must study hard, because we study, grades we’ll get.
A. harder; better
B. the harder; better
C. the harder; the better
D. harder; the better
答案：
A. harder; better
B. the harder; better
(答案→)C. the harder; the better
D. harder; the better
解析：本题考查的是比较级，the +比较级A···，the+另一个比较级B···，表示越A越B，故选C
