2014高考英语完形填空：2013暑假练习题（17）及答案解析
第二节：完形填空（共20小题；每题1分，满分20分） (选自杭高月考卷，略有改编)
阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项。 It seems like everywhere a person goes there is at least one person with a cell phone to his ear. Even in places 21 cell phone usage is banned such as concert halls or movie theatres there is the 22 offender, or at least a few people using the text messaging feature 23 their phones.
Cell phone usage has 24 over the past decade and continues to rise. Nearly 200 25 people in the United States have cell phones and there are 26 over one billion users worldwide. That means there are a lot of phones 27 their frequencies over the airwaves at any given time.
Concern has arisen over whether or not cell phone usage 28 harm a person’s health. Brain cancer rates in the United States have risen since call phones were 29 , leading some people to wonder if cell phone usage is the reason for the 30 .
Some people say the biggest danger 31 cell phones isn’t from the either real or perceived potential to develop cancer, but from 32 while using the cell phone.
