问题补充：
It is careless him to make the same mistake again. I think it important him to be more careful next time.
A. to; for
B. of; to
C. of; for
D. for; of
答案：
A. to; for
B. of; to
(答案→)C. of; for
D. for; of
解析：句意：他真是太粗心了再犯同样的错误。我认为下次更仔细对他来说很重要。本题考查It is +adj.+for/of sb to do sth.“做某事对某人来说是怎么样的。”当形容词修饰人sb时，用of；当形容词修饰to do时，用for。所以第一个句子中是说他粗心，而第二个句子是说更仔细重要。故选C。
