阅读短文，根据所给的首字母完成单词。
Chocolate lovers know that eating chocolate makes them happy. Now they may a______ become smarter by eating chocolate. Scientists let a group of people e_____ 85 grams of milk chocolate and asked a_______ group to eat no chocolate at all. After 15 minutes, the g_____ that ate chocolate were able to remember m_____ words and p______ than the group that did not eat chocolate. They believe that s______ in chocolate can make people smarter. Of course, e_____ chocolate doesn’t guarantee(保证) you’ll p____ every test. You’ll s_____ need to study hard.