Should we buy products _____ (制造)from recycled materials to help save energy为什么用made?
问题描述：
Should we buy products _____ (制造)from recycled materials to help save energy为什么用made?
答
made
products made from recycled materials:由回收材料制成的产品
其中：made是which are made的缩写
答
made 是制造的意思。 should 是情态动词，后面动词要还动词原形。
答
因为产品是被制造,所以用made
答
完整的形式应该是 which are made ，是修饰products的定语从句。这里省略了which are，所以。。。