Question

All possible means ____, but nothing can prevent the buildings ____.

A．has tried; from being pulled down

B．have tried; from pulling down

C．has been tried; from pulling down

D．have been tried; from being pulled down

Answer 1

D

考察主谓一致和prevent的用法。All means谓语动词用复数形式，prevent……from doing sth,阻止……干某事
句意为所有的方法都被尝试过了，但是什么也阻止不了这些建筑物被推倒。