until - Electric lightbulbs weren't used _________ the late nineteenth century., for - Gas was used to light homes ______a hundred years., century - Chocolate milk was sold as medicine in the eighteenth ___________., Each - _______ day, 27,000 trees are used to make toilet paper., Nowadays -  __________ no one uses the small pocket in jeans but they were originally designed for pocket watches., These - days, more chocolate is eaten in Switzerland than in any other country., ago - The first iPhone was made more than ten years_______., Until - _______ the 1990s, most people listened to music on CDs.,

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