问题补充：
The you are in the exam, the mistakes you will make.
A. carefully, few
B. more careful, fewer
C. more carefully, fewer
D. more careful, less
答案：
A. carefully, few
(答案→)B. more careful, fewer
C. more carefully, fewer
D. more careful, less
解析：考查句型：the+比较级····，the+另一个比较级····，表示越···就越···，句意：在考试中你越认真，你犯得错误就越少，fewer是few的比较级，修饰可数名词复数，less是little的比较级，修饰不可数名词，故选B
