新概念第三册第26课的几个疑问1、manufacturers had to pay more money than th

新概念第三册第26课的几个疑问
1、manufacturers had to pay more money than they had anticipated,这里的manufacturers为什么要加s,文中不是指的是一个工厂吗?第三段中 a company of biscuit manufacturers,是在各地有多个制造商的公司吗?同样,During a radio programme,a company of biscuit manufacturers once asked listeners to bake biscuits and send them to their factory,这一句中最后的their factory 中的their指的是什么?为什么不用its
2、该文的题目Wanted:a large biscuit tin,想要大的饼干罐.文中讲的是要大的饼干本身,为什么要写成要饼干罐.