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根据材料请回答 51～65
Can Loud Music Cause Hearing Impairmen？
Have you ever gone to a concert and realized that your seats were right next to the booming speakers？ Are you guilty 51 turning up the volume on your portable cassette or CD player to drown out the whining of your little brother？ Sometimes it's difficult to avoid loud music or noises，but they can be bad news because loud noises can 52 temporary or permanent hearing loss．
Extremely loud music and noise that go on for long periods of 53 are common causes of deafness．If a noise is so loud that you have to shout to make yourself 54 (which hap—pens a lot when you use machinery in wood or metal class at school or when you go to a concert)，there is a 55 that the mechanism inside your ear can be injured.
Temporary hearing loss can happen after you’ve been 56 to loud noise for only 15 minutes．If you have temporary hearing loss，you won’t be able to hear as 57 as you nor— mally can，and you may have tinnitus，which is a fancy word for ringing in the ears．Your ears can feel“full”，too． 58 ，these things usually go away and your hearing soon returns to normal．
Permanent hearing loss can happen when someone is exposed to loud noise 59 and over．Construction workers and people 60 work in factories must wear ear protection be—cause the equipment they use can be extremely loud.But even some lawn mowers and power tools can permanently 61 a person’s ability to hear high-pitched noises and can al—so give him permanent tinnitus .Listening to extremely loud music over and over can also have the same effect on a person’s 62 ．And using headphones on a portable cassette or CD player can be dangerous 63 if the volume is too high and the headphones are used a lot，the noise can damage the ears．
The best way to avoid hearing loss is to wear ear protection when working with ma— chinery and earplugs when going to a 64 ．Headphones are OK to wear when you’re lis— tening to music；just be sure the volume isn’t up too high，and give them a rest 65 0nce in a while.
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Pronouncing a language is a skill.Every normal person is expert in the skill of pro-nouncing his own language; but few people are even moderately proficient 51 pronounc-ing foreign languages.Now there are many 52 for this, some obvious, some perhaps not so obvious.But I suggest that the fundamental reason why people in general do not speak foreign languages very much better than they do is that they fail to grasp the true nature of the problem of learning to pronounce, and consequently never set about tackling it in the right 53 .Far too many people fail to realize that 54 a foreign language is a skill one that needs careful training of a special kind, and one that cannot be acquired by just 55 it to take care of itself.I think even teachers of language, while recognizing the impor-tance of a good accent, tend to neglect, in their practical teaching, the branch of study concerned 56 speaking the language.So the first point I want to make is that English.Pronunciation must 57 ; the teacher should be prepared to devote some of the lesson time 58 this, and by his whole attitude to the subject should get the student to feel that here is a matter 59 of receiving his close attention.So, there should be occasions when other aspects of English, such as grammar or spelling, are allowed for the moment to take sec-ond 60 .
61 from this question of the time give to pronunciation, there are two other require-ments for the teacher: the first, knowledge; the second, technique.
It is important that the teacher should be in 62 of the necessary information.This can generally be obtained from books.It is possible to get from books some idea of the me- chanics of speech, and of what we call general phonetic theory.It is also possible in this way to get a clear mental picture of the 63 between the sounds of different languages, be- tween the speech habits of English people and those, say, of your students.Unless the teacher has such a picture, any comments he may make on his students' pronunciation are unlikely to be of 64 use, and lesson time spent65 pronunciation may welt be time was-ted.
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