题目内容：

Do you believe in the power of music? If you’re like most kids these days, you probably have an electronic device loaded with hundreds or even thousands of your favorite songs. At any moment in time, you can fill your headphones with the sounds of a particular song that suits your mood at that exact time.

Are you getting ready for a big soccer match or do you need to get excited? Maybe some hip hop with a strong beat will do the trick! Besides, you might be ready to study for a big exam the next day. To calm your nerves and help you concentrate, a little bit of Mozart might make memorization more manageable.

But is there any scientific evidence of these effects that music seems to have? You bet there is! Scientists have long recognized the power of music. Over the years, many studies have been conducted to examine in greater depth the nature and extent of the effects music has on people.

For example, scientists at the University of Missouri have found that listening to music can have a positive effect on your mood. Their research gives scientific credibility(可信性) to the behavior that many people have already experienced on their own: listening to upbeat music can brighten your day and boost your mood.

Other studies have shown that upbeat music isn’t the only type of music that can be helpful, however. When people are sad or have suffered a personal loss, sad music can be helpful because people identify with the tone and lyrias(歌词) of the music. Likewise, people under a lot of stress or experiencing upsetting situations can benefit from listening to angry music. Although angry music might not help you if you’re in a normal mood, its tone can benefit you when you are dealing with stressful and upsetting situations.

1.What does the author mainly show in Paragraph 1?

A. The importance of having an electronic device.

B. The great number of songs on the Internet.

C. The benefits of choosing a song suiting your mood.

D. The convenience of finding a song suiting your mood.

2.According to the passage, what is the power of Mozart?

A. Making you less active.    B. Keeping you more refreshed.

C. Making you more focused.    D. Keeping you better informed.

3.Which of the following best explains the underlined word “boost” in Paragraph 4?

A. Predict.    B. Improve.    C. Express.    D. Ruin.

4.What can we learn from the last paragraph?

A. Only upbeat music can brighten our day.

B. People will feel sad when identifying with the lyrics.

C. Everyone can benefit from listening to angry music.

D. Different music functions differently in different situations.