-Cityairisverydirty,soitwouldbewise

问题详情：

-City air is very dirty, so it would be wise ___ you wash your hair often.

---I know, but it is not easy ____ me to do that every day.

A. for, of    B. of, of     C. of, for     D. for, for

【回答】

C  

知识点：介词和介词短语

题型：选择题