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sulfur dioxide

n.
1.a colorless toxic gas (SO2) that occurs in the gases from volcanoes

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    Idiom of the Day

    hit close to home
    to affect one personally
    The strike by the trash collectors hit close to home when we had no place to put our garbage.



    1.
    Choose an idiom to replace the expression in the brackets:
    The (final appearance) of the great opera star was a wonderful occasion.

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