Question

13. It's dangerous football in the street. 々”

   A. for us to play   B. of us playing

   C. for us playing   D. of us to play

Answer 1

13. A 考査句式的用法。

it's +形容词+ for/of sb. + to do sth.真正的主语是动词 不定式，意为“做某事对某人……”，如果形 容词不是表示人的品质.要用介词for。