of后接什么名词 tons

后接不可数名词，例如：

1、They have 2，500 tons of paper stored in their depository.他们有2，500吨纸存放在仓库里。

2、Three hundred thousand tons of cereals are needed to replenish stocks.需要30万吨谷类补充库存。

3、They've got tons of money.他们腰缠万贯。