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    精英家教网 > 初中英语 > 题目详情
    It is said that potato chips ____________ by mistake about a hundred years ago.
    A．inventB．inventedC．are inventedD．were invented
    D
    考察时态及语态。句意；据说炸薯片是100年前错误的被发明的。结合语境可知本句描述的是过去的状态，故用一般过去时态。句子主语是动作对象，故用被动语态。选D。
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