2. 外语
  3. Once they decided to have children, MiShel and Carl Meissner tackled the next big issue: Should they try to have a girl? It was

Once they decided to have children, MiShel and Carl Meissner tackled the next big issue: Should they try to have a girl? It was

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问题     Once they decided to have children, MiShel and Carl Meissner tackled the next big issue: Should they try to have a girl? It was no small matter. MiShel’s brother had become blind from a hereditary (遗传的) condition in his early 20s, and the Meissners had learned that the condition is a【C1】______ passed from mothers to sons. If they had a boy, he would have a 50 per cent chance of having the condition. A girl would be【C2】______.
    The British couple’s【C3】______ about gender selection led them to Virginia, US where a new sperm (精子)-separation technique, called MicroSort, was under【C4】______ When MiShel became pregnant, she gave birth to a daughter. They will try to have a second daughter using the technique later this year.
    This is not only a【C5】______ effective way to select a child’s gender. It also brings a host of ethical (伦理的) and practical considerations—especially for the majority of families who use the technique for【C6】______ reasons.
    The clinic offers sex selection for two purposes: to help couples【C7】______ passing on a gender-linked【C8】______ disease and to allow those who already have a child to "balance" their family by having a baby of the opposite sex.
    The technology is still【C9】______ However, Blauer says the company has an【C10】______ success rate: 91 per cent of the women who become pregnant after sorting for a girl are successful, while 76 per cent who sort for a boy and get pregnant are successful.
A) genetic B) overlapped C) impressive D) unaffected
E) perpetually F) investigation G) inquiries H) feats
I) disorder J) gropes K) experimental L) seemingly
M) elicit N) nonmedical O) avoid
【C7】
选项
答案O
解析 此处应填入动词原形，构成短语help sb．do sth．。空格后的passing on a…disease(把……疾病往下传)表明这种情况是要“避免”或“杜绝”的。故avoid符合语义要求。
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