—Remember this children . careful you are mistakes you will make .—We know Mr. Li .A.

问题补充：

—Remember this , children . careful you are,mistakes you will make .

—We know , Mr. Li .

A. The more; the more

B. The fewer; the more

C. The more; the fewer

D. The less; the less

答案：

A. The more; the more

B. The fewer; the more

(答案→)C. The more; the fewer

D. The less; the less

解析：

本题考查的为比较级的用法，the +比较级，the+比较级表示越......越......, 这里表示越仔细，错误就越少。故答案为：C