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  3. You know eating fruit and vegetables is virtuous. But did you know it can also make you look good? Peoplewho increased their int

You know eating fruit and vegetables is virtuous. But did you know it can also make you look good? Peoplewho increased their int

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问题     You know eating fruit and vegetables is virtuous. But did you know it can also make you look good? Peoplewho increased their intake over just six weeks developed a healthy【B1】______and appeared more attractive,researchers found. Scientists at St. Andrews University found eating them subtly increased yellow and redpigments in the volunteers’ skin. They【B2】______ the food intake of 35 people and took pictures of theirfaces, arms and hands using a【B3】______ camera at the start, and after three and six weeks. Increasingtheir intake of greens by 2. 9 portions a day was found to make the person look more healthy and an extra 3. 3portions could【B4】______ their attractiveness, when their【B5】______ were rated by others. Fruit andvegetables【B6】______ carotenoids, which, known by most people, can【B7】______ cell damage frompollution and UV rays, and can also prevent age-related diseases including heart disease and cancer. But while it was known eating extreme amounts of certain vegetables such as carrots could turn skin orange, it was notknown a small increase was perceptible to others—and was seen as【B8】______. A camera measured changesto the skin’s redness, yellowness and lightness, and found it significantly changed in people who naturallyincreased their intake. These changes were not【B9】______ at three weeks. Researchers showed these redand yellow hues【B10】______the levels of carotenoids(类胡萝卜素)in their skin.
【B4】
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答案enhance
解析 由空格前的情态动词could可知，空格处应填入一个动词。结合录音可知，答案为enhance，意为“增强，美化，提升”。
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