52.Large sums of money ______ each year in painting the steelwork of bridges,ships,and other exposed structuresa.have spent b.have to be spent c.have to spend d.spend为什么选B
问题描述：
52.Large sums of money ______ each year in painting the steelwork of bridges,ships,and other exposed structures
a.have spent b.have to be spent c.have to spend d.spend
为什么选B
答
这是被动语态