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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 se

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

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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 66-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.
【C6】
选项 A、clear
B、vague
C、impaired
D、poor
答案C
解析 根据前面的and提示的并列关系，可知whose vision has become______对应破折号前的blindness，并且联系第一句中Wyatt说以前看人们的脸就是模糊一团，现在能看清人们的脸了，可以判断此处要表达那些视力受损的人通过修补其基因可以恢复视力。故选C项impaired“受损”。
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