题目内容：
回答题：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. Losing__________(51)could become troublesome. A case released online in a letter by Annals of Oncology 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.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 couldn't get fingerprints from the man. There were no distinctive swirly__________(56) appearing from his index finger.
U.S. customs has been fingerprinting incoming foreign visitors for years, Tan says. Their index fingers are__________(57) and screened against digital files of the fingerprints of bad guys-terrorists and potential criminals that our federal guardians have been tasked with keeping out of the country. Unfortunately, for the Singaporean travelers, one potential__________(58)effect of his drug treatment is a smoothing of the tissue on the finger pads. __________(59), no fingerprints.
"It is uncertain when fingerprint loss will__________(60) to take place in patients who are taking eapecitabine," Tan points out. So he cautions any physicians who__________(61)the drug to provide their patients with a doctor's note 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 didn't raise any red flags. 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 __________ (64) its list of side effects associated with this medi-cine. The current list does note that patients may experience vomiting, stomach pain and some other side effects. But no where __________(65) it mention the potential for loss of fingerprints.
A．him
B．her
C．them
D．he
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