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  3. " Before the operation, I would look at someone and all I could see for their face was jelly," says Jonathan Wyatt. "Now, I can

" Before the operation, I would look at someone and all I could see for their face was jelly," says Jonathan Wyatt. "Now, I can

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问题     " Before the operation, I would look at someone and all I could see for their face was jelly," says Jonathan Wyatt. "Now, I can see people’s faces." The 65-year-old is one of six people in the world to receive gene therapy for a【C1】________type of inherited eye disease【C2】________choroideremia (an eye disease). The first published【C3】________of the trial, released today, suggest that【C4】________people’s genes can stop the disease from causing blindness—and【C5】________sight in those whose vision has become【C6】________.
    Choroideremia is caused by【C7】________in the CHM gene. In those who have the disease, a【C8】________of REP-1 means that cells in the eyes stop working and slowly begin to【C9】________causing blindness. Enter gene therapy, which uses a virus to insert a【C10】________copy of a gene into cells with a gene defect and could【C11】________be used to treat many genetic conditions. Robert MacLaren of the University of Oxford and his colleagues decided to see if it could【C12】________choroideremia. Starting two years ago with Wyatt, they【C13】________a virus carrying a corrective copy of the CHM gene into the eyes of people with choroideremia. Today the team【C14】________that of the six people who received the treatment six months【C15】________or longer, all have described【C16】________in their vision. Still, the long-lasting effects of the treatment remain【C17】________Wyatt had the treatment first, so can【C18】________that the benefits seem to last two years,【C19】________he’s just one case. The treatment also can’t replace cells that have been【C20】________destroyed.  
【C1】
选项 A、common
B、ambiguous
C、rare
D、simple
答案C
解析 本句是在解释说明第一句中Wyatt的疾病，说这是一种……类型的遗传眼病。Wyatt在第一句中说到手术前看人脸看到的是一团果冻，因此判断这不是一种常见的疾病。C项rare有“罕见的，特殊的”的意思，符合语义及搭配，故正确，
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