问题补充：
Are you worried about the coming exam?
No, I think the more you are, mistakes you’ll make.
A. Careful, the less
B. Carefully, the fewer
C. Careful, the least
D. Careful, the fewer
答案：
A. Careful, the less
B. Carefully, the fewer
C. Careful, the least
(答案→)D. Careful, the fewer
解析：carefully细心地；careful细心的；less更少的，修饰不可数名词；fewer更少的，修饰可数名词复数；least最少的，修饰不可数名词。句意：你为即将到来的考试担心吗？——不，我认为你越细心，你犯的错误就越少。根据前文系动词are，可知用形容词作表语，下文mistake为可数名词复数，故选D。
