It is said that potato chips ________ by mistake about a hundred years ago．
A．invent B．invented C．are invented D．were invented
科目：初中英語 來源： 題型：
It is said that potato chips ________ by mistake about a hundred years ago．
A．invent B．invented C．are invented D．were invented
科目：初中英語 來源：復習與測評 單元綜合測試卷 九年級上冊(配合牛津英語) 牛津版 題型：017
It is said that potato chips ________ by mistake about a hundred years ago．
A．invent
B．invented
C．are invented
D．were invented
科目：初中英語 來源：不詳 題型：單選題
| A．invent | B．invented | C．are invented | D．were invented |
科目：初中英語 來源：2012屆廣西南寧初中學校城鄉共同體九年級中考模擬考試英語試卷（帶解析） 題型：單選題
It is said that potato chips ____________ by mistake about a hundred years ago.
| A．invent | B．invented | C．are invented | D．were invented |
科目：初中英語 來源： 題型：
It is said that potato chips in KFC _________ by mistake about one hundred years ago．
A．were invented B．invented C．was invented D．is invented
科目：初中英語 來源：2007年湖南省懷化市初中畢業學業考試英語試題 題型：017
It is said that potato chips in KFC ________ by mistake about one hundred years ago．
A．were invented
B．invented
C．was invented
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