My advice is that more trees _______in front of the building A.be planted. B.to be planted 为...

题目

My advice is that more trees _______in front of the building A.be planted. B.to be planted 为...
My advice is that more trees _______in front of the building
A.be planted. B.to be planted
为什么是A不是B?不是被动语态么?

答案

此处应该是虚拟语气的用法.advise/advice出现在句中应该用虚拟语气 My advice is that more trees _（should ）be planted in front of the building.
should 可以省略 因此选A