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第6部分：完形填空(第51～65题，每题1分，共15分)
下面的短文有15处空白，请根据短文内容为每处空白确定1个最佳选项。
The Case of the Disappearing Fingerprints
One useful anti-cancer drug can effectively erase the whorls and other characteristic marks that give people their distinctive fingerprints(指纹)．Losing them could become troublesome．A case _________(51)online in a letter by Annals of Oncology(肿瘤学)indicates how big a________(52)of losing fingerprints is．
Eng-Huat Tan，a Singapore-based medical doctor describes a 62-year-old man who has used capecitabine to________(53)his nasopharyngeal cancer(鼻咽癌)．After three years on the_______(54)，the patient decided to visit U．S．relatives last December．But he was stopped by
U．S．customs officials________(55)4 hours after entering the country when those officials couldnt get fingerprints from the man．There were no_______(56)swirly marks appearing from his index finger．
U．S．customs has been fingerprinting incoming foreign visitors for years．Tan says．unfortunately，for the Singaporean traveler，one potential_________(57)effect of his drug treatment is a smoothing of the tissue on the finger pads．_________(58)，no fingerprints．
It is uncertain when fingerprint___________(59)will begin to take place in patients who are taking capecitabine，Tan points out．So he__________(60)any physicians who prescribe the drug to provide their patients with a doctorS___________(61)pointing out that their medicine may cause fingerprints to disappear．
Eventually，the Singapore traveler made it into the United States．I guess the name on his passport didnt raise any red flags． But heS also now got the explanatory doctors note-and wont leave home_______(62)it．
By the way，maybe the Food and Drug Administration(美国食品药物管理局)，____________(63) approved use of the drug 11 years ago，should consider updating its list of side effects _______(64)with this medicine．The current list does note that patients may experience vomiting(呕吐)，stomach pain and some other side effects．But no where__________(65)it mention the potential for loss of fingerprints．
51．A．released B．suggested C．accepted D．detected
52．A．problem B．gap C．sickness D．secret
53．A．cut B．treat C．find D．smooth
54．A．diet B．exercise C．recovery D．drug
55．A．in B．for C．at D．from
56．A．different B．strange C．interesting D．distinctive
57．A．good B．side C．normal D．main
58．A．However B．Meanwhile C．Hence D．Yet
59．A．chance B．mark C．loss D．danger
60．A．reports B．discourage C．cautions D．praise
61．A．note B．name C．book D．number
62．A．on B．out C．without D．off
63．A．who B．when C．which D．where
64．A．collected B．copied C．associated D．tested
65．A．must B．does C．can D．should