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    It is said that potato chips by mistake about a hundred years ago. A. invent B. invented C. are invented D. were invented 【查看更多】

     

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    It is said that potato chips ____________ by mistake about a hundred years ago.

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

     

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    It is said that potato chips ______ by mistake about a hundred years ago.

    [     ]

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

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     It is said that potato chips       by mistake about a hundred years ago.

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

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    It is said that potato chips ________ by mistake about a hundred years ago.

    A. invent

    B. invented

    C. are invented

    D. were invented

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    It is said that potato chips ________ by mistake about a hundred years ago．

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

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