ed with melanoma in Britain, but nearly a third of all cases occur in people younger than 50.

　　Based on current numbers Cancer Research UK predicts that melanoma will become the fourth_______(57) common cancer for men and women of all ages by 2024, and that cases will jump from about 9,0000 cases a year to more than 15,500.

　　Cancer experts _______(58) the rising number of skin cancer cases largely to the surge in people using tanning salons. "Spending time on sun beds is just as _______(59)as staying out too long in the sun," said Caroline Cerny of Cancer Research UK. The organization is starting a SunSmart _______(60) to warn Britons of the dangers of being too bronzed.

　　"The intensity of ultraviolet rays in some sun beds can be more than 10_______(61) stronger than the midday sun," Cerny said.

　　In the United States, several states require parental approval _______(62) minors can use tanning salons. Wisconsin bans people 16 and _______(63) from using tanning beds, and others ban children under 14. At least 29 states have regulations governing minors use of tanning salons.

　　In the UK, Scottish politicians passed legislation banning these under 18 from using tanning beds, though it hasn't yet been implemented. There are no plans for _______(64) in the rest of the UK.

　　The world Health Organization has previously recommended that tanning beds be regulated because of their potential to damage DNA in the skin.

　　Experts said most deadly skin cancers could be ______(65) if people took the proper precautions when in the sun and avoided tanning beds.

　　51. A. young B. married C. middle-aged D. elderly

　　52. A. overtaken B. overseen C. overlooked D. overwhelmed

　　53. A. encouraging B. misleading C. worrying D. booming

　　54. A. occasionally B. hopefully C. surprisingly D. typically

　　55. A. line B. point C. turn D. start

　　56. A. up B. on C. off D. to

　　57. A. most B. more C. very D. much

　　58. A. allocate B.