you study grades you will get.A. The hard the goodB. The harder the betterC. Harder

问题补充：

you study, grades you will get.

A. The hard, the good

B. The harder, the better

C. Harder, better

D. The better, the harder

答案：

A. The hard, the good

(答案→)B. The harder, the better

C. Harder, better

D. The better, the harder

解析：句意：你越努力学习，你取得的成绩就越好。固定句式the more，the more越……，越……，前后都用比较级。故选B。