It is said that potato chipsby mistake about a hundred years ago.[ ]A. inventB. inventedC. are inven

题目简介

It is said that potato chipsby mistake about a hundred years ago.[ ]A. inventB. inventedC. are inven

题目详情

It is said that potato chips            by mistake about a hundred years ago.
[     ]
A. invent
B. invented
C. are invented
D. were invented
题型:单选题难度:中档来源:同步题

答案

D

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