问题
Can you tell me why you learn English so well —— It’s very simple . ______ you work , ______ grades you will get .
A:The harder ; the best
B:The hard ; the better
C:The harder ; the better
D:The hardest ; the best;
B:The hard ; the better
C:The harder ; the better
D:The hardest ; the best;
正确答案是：
