Question

【题目】It’s difficult the math problem.

A .of him to work out B. for him to work out

C. of him working out D. for him working out

Answer 1

【答案】B

【解析】句意：对他来说算出这道数学题很难。It’s+ adj. + for/of sb. to do sth.做某事对于某人来说怎么样。首先排除C,D答案；如果形容词是修饰sb.的，也就是说能与sb.构成系表关系，就用介词of；如果形容词是修饰后面的动词不定式，就用介词for。此处的different不是修饰him的，而是做题难，要用介词for，故答案为B。