问题补充：
—Please remember, kids. careful you are, mistakes you will make.
—We know, Mr. Li.
A. the more; the little
B. the fewer; the more
C. the more; the fewer
D. the more; the less
答案：
A. the more; the little
B. the fewer; the more
(答案→)C. the more; the fewer
D. the more; the less
解析：句意：孩子们，请记住。你月细心，你犯的错误就越少。我们知道，李先生。Careful的比较级是在其前面加more构成。Mistakes错误，是复数名词。Fewer是few的比较级，可以修饰复数名词。More是many或much的比较级，可以修饰不可数名词或复数名词。Less是little的比较级，可以修饰不可数名词。所以选C。
