阅读下列短文，从文后各题所给的四个选项中选出一个最佳答案。
Where did you go yesterday? Did you hear 1at any of those places? Today most stores and restaurants play music. You might even hear music in an office or on a farm.
Scientists believe that music changes the 2people behave. According to some scientists, the sound of Western classical music makes people 3 richer. When a restaurant plays classical music, people spend more money on food and drinks. When the restaurant plays 4 music, people spend less money. With 5 music, people spend even less.
Scientists also believe that loud, fast music makes people eat faster. In fact, people eat their food faster when the music gets faster. Some restaurants play fast music during their 6 hours. This gets people to eat faster and leave quickly. Restaurants 7 make more money that way.
Some scientists think that music makes you think and learn better. They say 8 music helps students to be more active. It is true that people learn better when they are relaxed. And listening to music can help you relax.
The 9 time you hear music somewhere, be 10 . It might change the way you do things.
