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Have you ever felt a sudden feeling of joy because you heard a favorite song playing? Then you know that music can have a strong effect (影响) on your emotions.  It can help get you out of a bad mood (心情) or stay in a good one, says Alicia Ann Clair, professor at the University of Kansas.
To cheer up, listen to Latin music or anything with a strong beat or a fast speed  When you want to relax after a busy day, music with a slower speed can calm you down.
Listen to calming music before you start any stressful activities, advises Dr. Clair. "Once you' re in a good state of mind, it' s easier to keep it." You can lower stress at work with music, too, by playing relaxing tunes (曲调).    "If you listen to them all day long, you' ll stop noticing them," Dr. Clair explains. Then the music won' t have any effect.
 "To feel energetic, start with something relaxing, and then gradually increase the speed and beat," says Dr. Clair. For example, first play some nice slow love songs, and then listen to something more energetic. When you want to calm down after a busy week at work, just do the opposite.

A．Music can also help you relax and feel active.

B．Try to take advantage of this power of music.

C．But only play them when you really need them.

D．Loud and fast music can fill you with energy.

E. There are different kinds of music around the world.
F. Put on your favorite song, but only if it is one that can lift your spirits.
G. You can change your mood by changing from one kind of music to another.