It's easy to take your hearing for granted until it's too late.
With the wide 16 _ (popular) of digital entertainment products, it is not unmon to see people wearing headphones and listening to music 17 running in the park or using public transport. And the volume is often 18 loud that people around them can hear the music as well.
However, doctors warn that such behavior can potentially damage 19popularity hearing. Innoisy places, people tend 20 _(turn) the volume up to get the same clarity of sound. Unfortunately, that can damage the hearing 21 people being aware of it, said Feng Yongfeng, chief ENT physician at Beijing Tian'an Hospital.
After Spring Festival, the hospital witnessed 22 slight increase in the number of teenagers ing in with hearing problems, 23 Feng attributed to them wearing headphones at home for long periods during the holiday. Feng said both in-ear and overhead headphones can harm the ears and 24 (advise) against using them for long periods. He said if you do use headphones it is worth 25 (invest) in the highest quality you can afford.
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解析：
【小题1】popularity wide后面of前面要接名词，popular的名词为popularity。
【小题2】while 指在公园跑步或者坐公交车的时候，经常看见人们带着耳机。While当…时
【小题3】so 固定句型so…that…如此…以至于…
【小题4】their 这里的their是会损害指上文提及的带着耳机，听着吵闹音乐的人的听力。
【小题5】to turn 固定词组tend to do sth倾向于做某事。
【小题6】without 句意是指很多了没有意识到这一点。
【小题7】a 这里是指有听力问题的人的数量有一些轻微的增加。
【小题8】which 非限制性定语从句的关系代词。
【小题9】advised 这里指Feng Yongfeng教育人们宾语长时间的用耳机。
【小题10】investing 固定句型sth be worth doing某事值得被做。