10.
阅读下面短文,在空白处填入1个适当的单词或括号内单词的正确形式。

When you are tired, you may want to eat something sweet, like some chocolate, (improve) your mood (情绪). After all, it (believe) that sugar gives us energy. But a recent study suggests that sugar can make us feel worse rather than improve our moods.
Scientists collected data(数据) from 31 studies among nearly I, 300 (adult). They studied how sugar influences (people) moods.
They found that people have too much sugar become more tired and less alert(警觉的) within an hour. According to the scientists, when people take in sugar, their blood sugar levels rise quickly, leading to short" feel good" period. However, as they begin to digest(消化) the sugar, their blood sugar levels begin fling quickly, leading to a bad feeling. To remain on a "high" level, people will (probable) eat more and more sugar. This (prevent) the body from relaxing, leaving people feeling more tired and less alert.
But we needn't think we must give up all sweet food. According to the World Health Organization, it is (health) to have the sugar found naturally in fruit, vegetables and milk. But, you still can't take in too much of it.
So the next time you feel tired, perhaps you should think twice you eat chocolate or candies.