-Cityairisverydirty,soitwouldbewise

問題詳情：

-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  

知識點：介詞和介詞短語

題型：選擇題