Potatochips

问题详情：

Potato chips _________ by mistake about a hundred years ago are very popular now.

A. invent                 B. invented                   C. are invented              D. were invented

【回答】

B   句意：大约一百年前偶然被发明的炸薯片现在非常受欢迎。故此处应用过去分词作后置定语，修饰potato chips，表示被动。

知识点：相似 相近词比较

题型：选择题