请教一道英语题,求解释,这个要怎么选

题目

请教一道英语题,求解释,这个要怎么选
A large quantity of money___ each year in painting the steelwork of bridges,ships,and other exposed structures.
A.have spent
B.have to be spent
C.has spent
D.has to be spent

答案

D.money 是不可数名词,后面肯定是要用单数形式.
如果是C,money只能是被花的,不是自己花的,所以C的用法不对.如果是has been spent就没有问题.
排除法,选D.意思是：必须被花在XXXXX上.