2. 外语
  3. A U.S. biotechnology(生物工艺学)firm said on Wednesday it had developed a new technique to produce genetically【S1】______chickens that

A U.S. biotechnology(生物工艺学)firm said on Wednesday it had developed a new technique to produce genetically【S1】______chickens that

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问题     A U.S. biotechnology(生物工艺学)firm said on Wednesday it had developed a new technique to produce genetically【S1】______chickens that could be used to produce treatments for human diseases.
    The technology,【S2】______by scientists at the【S3】______California company Origen Therapeutics and researchers at the University of California, Davis, may also lead to improved poultry production and chickens【S4】______to avian flu(禽流感). Origen is one of several biotech groups that have been working on new ways to produce human antibodies and proteins in eggs, milk and farm crops.
    Robert Kay, the president of Origen, said in an interview that the technology would allow scientists to【S5】______the chicken【S6】______in ways that could allow them to produce drugs in very large quantifies and develop new therapies. The technology is based on genetically engineering primordial germ cells(原生殖细胞), the precursor cells to sperm (精子) and eggs(卵子), in chickens. Marie-Cecile van de Lavoir, the senior scientist at Origen, said the cells were the key to introducing genetic【S7】______into chickens and to passing them on to future【S8】______.
    The company hopes to use the technology, described in the journal Nature, to produce antibodybased【S9】______for illnesses and to【S10】______the problem of drug resistance in certain diseases.

A) elements         B) due               C) generations       D) clone
E) alter            F) modified          G) genome            H) devised
I) therapies        J) artificial        K) overcome          L) privately-owned
M) produce          N) crucial           O) resistant
【S1】
选项
答案F
解析 modify意为“更改，修改”；artificial“人造的，假的”。根据句子可以推断此选项应选形容词性的词。再根据句意应选modify的过去分词。
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大学英语四级

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