It's careless____you to make so much mistakes.(不是有个句型：It's good for sb.to do sth)

It's careless____you to make so much mistakes.(不是有个句型：It's good for sb.to do sth)
It's careless____you to make so much mistakes.(不是有个句型：It's good for sb.to do sth)

It's careless____you to make so much mistakes.(不是有个句型：It's good for sb.to do sth)
填写：of
翻译：你出了这么多错,太不细心了
解析：It's good for sb. to do sth的确存在这个句式,但是此句中careless是表示人物性格的,在英语中It's +表示性格的词+of sb. to do sth
举例：It's very kind of you to help us. (承蒙惠助, 不胜感激.)
希望对你有帮助,祝学习进步

of。因为careless是表示you的特点，品格，故用of。而good是表示do sth，因此用for.

of