根据方框里所给出的单词提示及短文意思填空。
A source B on average C plastic D fixed E examined
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The US public uses about 50 billion water bottles a year and most of those ____ bottles are not recycled, according to Elizabeth Royte’s book Bottlemanid: How Water Went on Sale and Why We Bought It.
More than $100 billion is spent every year on bottled water in the U.S. in many developing countries where there isn’t a safe ____ of tap water, bottled water is the only choice.
In the US, tap water is controlled by the government and often ____ for dangerous substances(物质). Each American drinks 79 litres of bottled water per year ____. The bottled water industry is so successful that it has outpaced milk, coffee, and juice in the number of gallons of drinks sold – putting it behind only beer and soda.
