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         _______ in the 1800s and first mass-produced in Germany, the harmonica(口琴) was designed to play simple folk tunes.
A．Being inventedB．InventingC．InventedD．Having invented
C
考查非謂語動詞。邏輯主語the harmonica與invent之間為被動關(guān)系，故用過去分，選C。
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