Instruments are a necessary part of making music, but what music sounds like will also depend upon     1     (it) style and rhythm. Music is often divided     2     two main groups: classical and popular. These names can mean different things to different people, and their meanings can change over time.

Popular music is what many people play or listen to for fun. It could be folk, country, pop and rock, or jazz. Often the music style     3     (change) with each new generation of musicians. All over the world there are talented    4     (music) who perform this style of music     5     (earn) a living or just for fun. A band of musicians usually play a certain style of music that they like,     6     (create) a sound that is special to them.

Classical music is     7     (most) used to describe more formal music, often performed in front of a seated silent audience. Most of this music     8     (write) a long time ago. Classical music is often played by an orchestra (管弦乐队) in     9     musicians play either woodwind, brass, or string instruments.

There are many famous orchestras throughout     10     world, with many countries having their own special ones.

2 . When Capt. Greg Galeazzi joined the Army seven years ago, he was well aware of the risks of injuries or even death he would face. In 2011, the risks became Galeazzi’s reality — he got terribly injured in an explosion where he lost his double legs. “I was a shell of a man,” he said. “Who I was, was gone.”

Before his injury, playing the guitar had been a special pastime for Galeazzi. Music had always been important to him. He felt deep sadness because he thought he’d lost his ability to play music.

However, everything changed when Galeazzi joined MusiCorps, a music rehabilitation (康复) program for severely wounded soldiers who are recovering at Walter Reed National Military Medical Center. “We match the injured troops with professional musicians,” said Arthur Bloom, who founded the program in 2007. “They help wounded soldiers play music and recover their lives.”

Bloom, a graduate of the Yale School of Music, offers his services to patients at Walter Reed who have an interest in playing an instrument. Program participants practice technique, write and record music. Or they may just get together for a jam session (即兴演奏会).

The journey to recovery for many soldiers is a long one. It can require dozens of operations and many years spent in hospitals. There’s so much downtime at Walter Reed, and that’s what they fill up with music.

Since 2007, Bloom and his group have helped hundreds of wounded soldiers. For Galeazzi, joining MusiCorps has helped restore his confidence and made him more optimistic about his future. “Something survived that horrible injury in Afghanistan,” Galeazzi said. “Arthur and his program changed my outlook on what is possible.”

“I’ve seen guys going through such a hard time with their injuries that they are very withdrawn,” Bloom said. “The music becomes their new way of communicating. It can be just as powerful as the spoken word. By injecting music into this space, we can inject life.”

5 . Should you listen to music when you work?

Do you like to listen to music when you work?

Ask this question at a party, and you’ll probably get _________ responses. Some will say they love it, claiming that it improves their performance; others will say they find it distracting (分散注意力的) and cannot work _________ with music playing in the background.

Interestingly enough, our research has found that both of these viewpoints can be true. It just _________ on what sort of work you’re doing.

In a recent study, we brought participants into our lab to perform a variety of tasks. They included a(n) _________ task-searching through word lists and crossing out words containing the letter “a” and a more difficult task—memorizing word pairs and _________ word to its partner. Some participants completed all of the tasks in silence, _________ others completed the tasks with instrumental music that was cither loud or soft, and either simple or complex, the latter meaning music with more instruments being played. Several key findings _________ from our study.

We found that participants who listened to simple music or no music performed about the same on the easy task. However, participants who listened to _________ music performed best on the easy task.

On the contrary, participants performed worse on the more difficult task when they listened to any music, regardless of complexity or volume, compared to those who didn’t listen to any music.

How should we _________ these findings?

We suggest that people have limited mental resources from which both __________ and tasks can draw. We can become __________ and our minds may wander when these resources are not fully used. But we also can become over-excited and __________ when these resources are used up.

Not surprisingly, we typically need to use fewer of our mental resources when we perform easy tasks, whereas demanding tasks require more brainpower. However, because we might be less __________ during easier tasks, there’s a greater risk of drifting off. Music might give us the extra __________ we need to overcome the monotony (单调). However, difficult tasks already demand lot of our resources. Listening to music can become too much.

So best __________ should appear when we strike “sweet spot,” which may depend on the type of music and the type of task.

6 . Dancing with your grandma for 15 minutes a week promotes positive feelings and improves her state of mind, a study claims. Doctors from Israel are encouraging younger family members to have a regular visit to their grandmas and have a dance with their grandmas.

And they found a 15 minute boogie (布吉舞) once a week lifted the spirits of the elder family members and helped strengthen the familial bond. In fact, it is called Dance Movement Therapy (DMT). DMT across the generations, complete with eye contact, was found to promote positive feelings and improve spirits for the elderly.

The grandparents reported a bright state of mind, happy memories and uplifted spirits. Dancing has also previously been linked to improved muscle strength, balance and endurance (耐力). For the grandchildren in the study, the weekly boogie changed how they view aging and allowed them to come to accept the eventual death of their elderly relatives.

The study, published in the journal Frontiers in Psychology, assessed how dance affected general health of 16 dance movement therapists (治疗师) and their grandmothers. DMT was taken seriously due to the fact that it is easily accessible and does not cost more to practice. The researchers were eager to examine a low-cost method to treat issues commonly faced by an aging population— such as limited mobility and depression(抑郁症). Grandchildren were instructed to make eye contact and encourage playfulness and touch. They were also told to mirror their grandmothers’ movements and give them time and space to rest when needed.

The sessions were recorded and then analysed while diaries and interviews captured the opinions and feelings of the participants. As well as the benefits to the health of the senior, the experiment also changed the idea of the younger family members.

9 . When students and parents are asked to rate subjects according to their importance，the arts are unavoidably at the bottom of the list. Music is nice, people seem to say, but not important. Too often it is viewed as entertainment, but certainly not an education priority（优先）. This view is shortsighted. In fact, music education is beneficial and important for all students

Music tells us who we are. Because music is an expression of the beings who create it, it reflects their thinking and values, as well as the social environment it came from. Rock music represents a lifestyle just as surely as does a Schubert song. The jazz influence that George Gershwin and other musicians introduced into their music is obviously American because it came from American musical traditions. Music expresses our character and values. It gives us identity as a society.

Music provides a kind of perception(视角) that cannot be acquired any other way. Science can explain how the sun rises and sets. The arts explore the emotive（情感的）meaning of the same phenomenon. We need every possible way to discover and respond to our world for one simple but powerful reason: No one way can get it all.

The arts are forms of thought as powerful in what they communicate as mathematical and scientific symbols. They are ways we human beings “talk” to each other. They are the language of civilization through which we express our fears, our curiosities our hungers, our discoveries, our hopes. The arts are ways we give form to our ideas and imagination so that they can be shared with others. When we do not give children access to an important way of expressing themselves such as music, we take away from them the meanings that music expresses.

So music education is far more necessary than people seem to realize.

10 . Studying how people move to music is a powerful tool for researchers looking to understand how and why music affects us the way it does. Over the last few years, researchers at the Center for Interdisciplinary Music Research in Finland have used motion capture (运动捕捉) technology to learn that your dance moves say a lot about you, such as what mood you happen to be in, and even how much you understand other people's feelings. Recently, however, they discovered something amazing.

In fact, we weren't looking for this result, as we set out to study something completely different, explains Dr. Emily Carlson, the first author of the study. “Our original idea was to see if we could use machines to identify which category of music our participants were dancing to, based on their movements.”

The 73 participants in the study were motion captured dancing to eight different categories. The only instruction they received was to listen to the music and move any way they felt natural. The researchers then analyzed their movements using machine learning, trying to distinguish between the different kinds of music. Unfortunately, their computer algorithm (算法) was able to identify the correct kind less than 30% of the time. They were shocked to discover, however, that the computer could correctly identify which of the 73 individuals was dancing 94% of the time. Left to chance (that is, if the computer had simply guessed without any information to go on), the expected accuracy would be less than 2%.

“It seems as though a personas dance movements are a kind of fingerprint,” says Dr. Pasi Saari, co-author of the study and data analyst, “Each person has a unique movement signature that stays the same no matter what kind of music is playing.” Some kinds, however, had more effect on individual dance movements than others. The computer was less accurate in identifying individuals when they were dancing to Metal music.