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    — Cangjie create(创造) the first Chinese characters(汉字)?

    —More than 4,000 years ago.

    A. When were B. How long were

    C. When did D. How long did

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    Scientists have long known that eating late at night can make us gain weight. But now a new study has shown that late-night eating can also have a bad influence on our brains — it might hurt our ability to learn new things and store memories.

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