问题补充:
It’s necessary us English well.
A. for , to learn
B. for , learning
C. of , learning
D. of , to learn
答案:
(答案→)A. for , to learn
B. for , learning
C. of , learning
D. of , to learn
解析:
试题分析:强调句式, It is adj for sb to do sth,做某事对某人来说怎么样。本句中it是形式主语,指代后面不定式内容做形式主语,注意for后面接表示人的对象,to后面接动词,故选A。