The Case of the Disappearing Fingerprints One useful anti-cancer drug can effectively erase the whorls(萝状指纹)and other charact

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问题                  The Case of the Disappearing Fingerprints
   One useful anti-cancer drug can effectively erase the whorls(萝状指纹)and other characteristic marks that give people their distinctive fingerprints.Losing them could become troublesome.A case【51】______online in a letter by Annals of Oncology indicates how big a【52】______losing finger prints is.
   Eng-Huat Tan,a Singapore-based medical doctor describes a 62-year-old man who has used capecitabine(卡培他滨)to【53】______his nasopharyngeal cancer(鼻咽症).After three years on the【54】______,the patient decided to visit his U.S.relatives last December.But he was stopped by U.S. customs officials【55】______4 hours after entering the country when those officials couldn’t get finger prints from the man.There were no【56】______swirly(旋涡状的)marks appearing from his index fin ger.
   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 doctor’s【61】______pointing Out that their medicine may cause fingerprints to disappear.
   Eventually,the Singaporean traveler made it into the United States.But he’s also now got the explanatory doctor’s note-and won’t leave home【62】______it.
   By the way,maybe the Food and Drug Administration,【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.

选项 A、who
B、when
C、which
D、where

答案C

解析 本句考查非限制性定语从句,the Food Drug Administration为表示事物的先行词,在从句中作主语,故选C。
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