Charles Hires did not invent root beer，however.The Library of Congress has cookbooks that contain recipes from ten or twenty years before he began to sell his version，but he got credit as the first person to produce and market the drink throughout the country.

　　He sold his health drink in bottles，but since some people liked to make their own root beer he also sold root-beer kits(成套设备)．Hires sold a powder mix and a syrup(原汁)．The syrup only needed to have water added to it，and still today this practice of selling syrup to locally owned bottlers is followed throughout the soft-drink industry.

　　Over the years，America’s taste for carbonated soft drinks has changed.Colas，like Coke and Pepsi，become much more popular than root beer.But root beer has been at the root of some big developments over the years.In nineteen twenty-seven，a newly married couple opened a root beer restaurant called A&W.A&W is both a well-known brand of root beer and a restaurant chain.There are hundreds of different brands of root beer，and at least five English-language websites review them.

　　5．From the text we learn that______.

　　A．there are various flavors of root beer

　　B．some root beers contain alcohol

　　C．root beer can be used as a medicine

　　D．no flavoring can be added to root beer

　　6．In the author’s opinion，Charles Hires______.

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