Question

完形填空。
It seems like everywhere a person goes there is at least one person with a cell phone to his ear. Even in places   1   cell phone usage is banned such as concert halls or movie theatres there is the   2   offender, or at least a few people using the text messaging feature   3   their phones.     Cell phone usage has   4   over the past decade and continues to rise. Nearly 200   5   people in the United States have cell phones and there are   6   over one billion users worldwide. That means there are a lot of phones   7   their frequencies over the airwaves at any given time.     Concern has arisen over whether or not cell phone usage   8   harm a person's health. Brain cancer rates in the United States have risen since call phones were   9  , leading some people to wonder if cell phone usage is the reason for the   10  .      Some people say the biggest danger   11   cell phones isn't from the either real or perceived potential to develop cancer, but from   12   while using the cell phone. How many of us have seen vehicles driving   13   erratically (不稳定地) down the road. And we often see when we get near the vehicle the driver on a cell phone is   14   on a cell phone. It is a proven fact that a driver on a cell phone is   15   attentive and more likely to get in an accident. And, hands-free sets aren't the   16   that some people may believe. Yes, they   17   both hands for driving and prevent a person from getting a sore (酸疼的) arm,   18   the driver's mind is still   19   the conversation and therefore less attentive to what is   20   around him or her on the road.
(     )1. A. which     (     )2. A. busy     (     )3. A. under     (     )4. A. been exploded (     )5. A. millions    (     )6. A. well     (     )7. A. delivering (     )8. A. may       (     )9. A. allowed   (     )10. A. increase (     )11. A. with     (     )12. A. attention (     )13. A. quite   (     )14. A. using   (     )15. A. more     (     )16. A. problem (     )17. A. hold up (     )18. A. therefore (     )19. A. taken up   (     )20. A. happening to	B. where   B. always B. on     B. exploded B. millions of B. good   B. carrying B. must   B. invented B. decline   B. before B. attractive B. almost B. talking B. less   B. question B. pick up   B. as     B. filled by B. going on	C. there   C. occasional C. from   C. been exploding C. million   C. better C. taking C. can     C. introduced C. improvement C. in   C. careless C. hardly C. moving   C. least   C. mean   C. put up C. but     C. occupied with C. talking about	D. here           D. occasionally   D. to             D. exploding       D. million of     D. best           D. sending         D. should         D. bought         D. rose           D. on             D. inattentiveness D. nearly         D. handing         D. fewer           D. answer         D. free up         D. though         D. picked up       D. moving about

Answer 1

1-5: BCBBC  6-10: ADCCA  11-15: ADABB  16-20: DDCCB