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    Let's face it．No one drinks diet soda for the taste．People drink diet soda in the hope that it will help them lose weight or at least keep them from gaining it．Yet it seems to have exactly the opposite effect, according to a new study．
    Researchers from the University of Texas said those who drank two or more diet sodas a day had waist size increases that were six times greater than those who didn't drink diet soda．"What we saw was that the more diet sodas a person drank, the more weight they were likely to gain," said Sharon Fowler．
    The study was based on data from 474 participants in a large, ongoing research project, where the participants were followed for nearly l0 years．
    While the findings are surprising, they also offer some explanations．
    Nutrition expert, Melanie Rogers, who works with overweight patients in New York, has found that when patients are switched from regular to diet soda, they don't lose weight at all．"We weren't seeing weight loss necessarily, and that was confusing to us," said Rogers．
    So why would diet soda cause weight gain? No one knows for sure yet, but it could be that people think they can eat more if they drink diet soda, and so over-compensate for the missing calories．
    A related study found some sweeteners （甜味剂） raised blood sugar levels in some mice．"Data from this and other potential studies suggest that the promotion of diet sodas and artificial sweeteners may be risky," said Helen P．Hazuda, professor at the University of Texas's school of medicine．"They may be free of calories, but not of consequences．"
    【小题1】People drink diet soda to _____．

    A．enjoy its tasteB．achieve weight loss
    C．stay in fashionD．gain more energy
    【小题2】The new study suggests that drinking diet soda _____．
    A．causes people to become heavierB．helps people to be healthier
    C．makes people much thinnerD．offers people more calories
    【小题3】We can learn from the passage that _____．
    A．regular soda makes people lose more weight
    B．diet soda does help reduce calories
    C．diet soda drinkers tend to eat more food
    D．most blood diseases come from diet soda
    【小题4】The underlined word "They" in the last paragraph probably refers to _____．
    A．sweeteners
    B．diet soda drinkers and sweetener takers
    C．sodas
    D．diet sodas and artificial sweeteners


    【小题1】B
    【小题2】A
    【小题3】C
    【小题4】D

    解析

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