分类：教育/科学-外语学习
问题：英语Itisimpossible()findataxiinsuc 
It is impsible (   ) find a taxi in such a thick fog.a.of us tob. for us toc.for we tod.with us to选哪个?为什么? 
回答：It is impossible ( ) find a taxi in such a thick fog
b. for us to