It's a green city_us to know_A,to from B,forabout,Cwith,to D,for around选择?为什么?
问题描述：
It's a green city_us to know_A,to from B,forabout,Cwith,to D,for around选择?为什么?
答
B
for us to know about 是不定式的复合结构作后置定语,修饰city
A,C 没for
D around 用错.了解.用know about