选择题What you have done has made _____possible for me to make rapid progress in English.

this C.these 详细一点A，解释一下.it B.that D，要翻译

A it
翻译：你所做的使我的英语取得了飞速的进步。
make it possible for sb to do sth 使得某人做某事成为可能

.A it it作形式宾语，真正的宾语是后面的动词不定式结构to make..

A.it

A. it 是形式宾语，不定式是真正的宾语 make it possible for sb to do sth是固定搭配。 做什么事情有可能 你所做的有可能快速提高我的英语水平

一楼的正解，完整的结构是： 动词 it adj./n. (for/of sb) to do sth 当前面是用名词时，后用for 当前面的形容词是修饰人时，用of; 修饰不定式时，用for .如： We think it our duty for us to help others. I find it difficult for him to finish the job in such a thort time. I think it nice of you to help him.

A.