It is careless such a mistake.A. of you to makeB. of your makingC. for you to makeD. for

It is careless such a mistake.
A. of you to make
B. of your making
C. for you to make
D. for your making

(答案→)A. of you to makeB. of your makingC. for you to makeD. for your making解析：固定句式It is +形容词 +of sb to do .It is/was +adj.+of sb. to do sth.句型通常表示说话人对客观事件的惊讶、兴奋、懊悔、难过等感叹情绪，其实相当于感叹句。如：It’s very kind of you to help me. 你能帮助我，真是太好了！该句型中用作表语的形容词常见的有如下几类: 一、表示聪明或愚蠢的形容词：clever, wise, foolish, stupid, silly, unwise等如：It is silly of him to do such a thing. 他竟干出这样的事真是愚蠢。二、表示正确或错误的形容词：right ,wrong, correct, incorrect等如：It was right of her not to come here.她没有来这儿太对了。三、表示好坏等品性的形容词： good, nice, kind, sweet, friendly, lovely, wonderful等如：It is friendly of you to come and see me. 你能来看我真够朋友。四、表示褒义或贬义色彩的形容词：brave, polite, careless, selfish等如：It was brave of you to manage to do it. 你居然能做成这件事真勇敢。It is/was +adj.+ for sb. to do sth.句型 常用于表示事物的特征特点，表示客观形式的形容词，如easy, hard, difficult,　interesting, impossible等：　　 It's very hard for him to study two languages. 对他来说学两门外语是很难的。本题属于四、表示褒义或贬义色彩的形容词：brave, polite, careless, selfish等，故选A。

我明天再问问老师，叫他解释下这个问题