Modem science and technology has brought ________ many changes in our lives．

1. A.
   in
2. B.
   about
3. C.
   up
4. D.
   into

The reason why science exists is to improve our lives. Sometimes science can ruin our small guilty pleasures we nature to be happier, though. These four little truths are just some of those.

   Sleeping with pets is a good way to catch the plague(瘟疫), or some other bacterial infections, as is claimed in the study done in February 2011 in Emerging Infectious Diseases magazine. The study shares a case of a nine-year-old boy whose cat caught the plague and gave it to its owners while they were sharing a bed. A regular visit to the vet can greatly reduce the risk of your pet catching any disease that may infect the owner as well.

   A recent study done on 200,000 people has shown that vitamin supplements do nothing to improve our lives, and what is worse—they actively increase our death risk. This conclusion from 2010 was so unbelievable that it made researchers do even more studies. Each study had the same result. People who choose vitamin supplements over fruit and vegetables are the same as people who choose to eat a burger over a healthy salad.

   People who use the solarium(日光浴室)experience certain changes to their brains that are very similar to many caused by drug addiction. According to a study, our brain can in fact recognize the difference between the natural UV light and the solarium.

   Long exposure to artificial light during the night is directly linked to a higher risk of breast cancer, obesity and depression. Exposure to artificial light before sleeping disturbs the natural biorhythms(生物节奏)of our bodies, which leads to restriction on the hormone(荷尔蒙)melatonin, which is the hormone that helps us fall asleep.

As we all know, music is p___1.____ the most importantpart in our day-to-day lives. Some songs can ___2.____ (激励) us and drive us forward, while _____3._____ may remind us ___4.__ the people whom we love. Many important occasions like those of ___5.____ (婚礼) or sports and games have their special music. Every nation has its n____6.___ anthem. With years p_____7.___ by, music grows and changes.Modern science has also changed music. Inventions like records, radios, movies, ___8.____ (电的) instrument, tapes,recorders and videos have changed the way in ___9.___ we play and listen to music; they have h___10._____ to make music an important form of international communication.