We should use the things _______ of paper.
问题描述:
We should use the things _______ of paper.
A.make B.to make c.made D.making 这题答案是C 为什么made前没有is呢?
答
此句原型是We should use the things that are made of paper.省略后就去掉that are什么情况要省略系动词呢?that are made of paper是一个从句,是完整形式,省略形式是made of paper.省略形式必须去掉系动词