题目

 阅读理解Do you crave chips, pizza, donuts, or cake? These kinds of foods are high in sugar and fats, which make them delicious but not nutritious. A recent analysis suggests that certain ingredients in these types of processed foods can be addictive. According to the research published in the journal Addiction, certain foods can trigger the same feelings as drugs. It all comes down to what's happening in the brain. When we feel happy, it's due to a flood of the feel-good chemical dopamine(多巴胺) in the striatum. This region is part of the brain's reward circuit. The striatum gets a dopamine rush when something good happens. Drugs and alcohol can cause a similar high. So, it turns out, can some popular snack foods. "We're designed to find carbohydrates(碳水化合物) and fats, " says Ashley Gearhardt, a psychologist at the University of Michigan in Ann Arbor. Evolving such tastes helped our ancestors "overcome famine and make sure we survive, " she explains. That critical role shaped the brain's reward system, making us hard-wired to enjoy carbohydrates and fatty foods. The problem isn't with all foods containing carbohydrates and fats. Fruit is full of sugar. Oats and other whole grains have lots of carbohydrates. Nuts and meat have fat. But such unprocessed foods—eaten in a form that's similar to how they grew—also contain other nutrients, such as fiber, that slow digestion. That limits how quickly our bodies can absorb the nutrients. Cookies, candy, soda, fries and other highly processed foods lack those additional nutrients. Such foods contain ingredients that have been highly changed from their natural state. They're chock full of easy-to-absorb carbohydrates and added fats. What's more, they often contain ingredients that don't naturally occur together. When we eat these foods, we get a quick "hit" of carbs and fats that give the brain a boost. That makes us want to eat them again and again. （1） According to the article, which types of food can be addictive? A . Fruits and grains. B . Cookies and cake. C . Nuts and meat. D . Oats and fiber. （2） Why are humans hard-wired to enjoy carbs and fatty foods, according to the article? A . They provide quick energy. B . They helped our ancestors survive. C . They are full of fiber. D . They contain natural sugars. （3） How does the brain react when we eat certain highly processed foods? A . It gets a boost of carbs and fats that make us feel full. B . It slows down the digestion process. C . It triggers the same feelings as drugs. D . It releases feel-good chemicals that prevent addiction. （4） What is the main idea of the article? A . Certain processed foods can create addictive responses. B . Unprocessed foods are better for you than processed foods. C . Our brains are born to enjoy carbohydrates and fats. D . The lack of additional nutrients in processed foods makes them unhealthy. 答案： B B C A

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