Many farmers in the countryside have gone to cities to look for work and left their children behind

题目

Many farmers in the countryside have gone to cities to look for work and left their children behind _ by their grandparents.A.to be raised b.raised c.being raised d.raising
为什么b不行

答案

许多在村庄的农民到城市来寻找工作,并且要把他们的孩子留给祖父祖母照顾.
首先“孩子”一定是“被照顾”,所以要选个被动语态的,
其次leave sth to be done留下某事要做,不定式表将来.放在这里就是“留下孩子需要被祖父祖母照顾”的意思,所以选A符合