At present，almost everyone has a mobile phone，but have you ever thought that cell phones
(1) be bad for your health？A study shows that heavy mobile phone use may cause hearing loss．
This study shows that people who use cell phones for about an hour a day have a
(2) time hearing some similar sounds，especially in their right ears．It is getting harder for
(3) to tell the difference between the sounds of"s"and"f"，and"t"and"z"．
Researchers studied 100people who used cell phones and
(4) them with 50people who did not．The study lasted for 12months．What the researchers found was that cell phone users had more hearing
(5) than those who did not use cell phones．
Besides this，our ears have many little
(6) inside them．Too much noise will cause these hairs to get weak and
(7) die．When these hairs die，it affects our ability to listen．
However，cell phone users don't care too much
(8) this study．One man said，"I'd be more worried about people who
(9) MP3players．They put those earphones in their ears and listen to very
(10) music．I think that is more likely to cause hearing loss than a cell phone．"