题目信息
Responding to the public's fascination with-and sometimes undue alarm over-possible threats from asteroids, a scale developed by astronomers rates the likelihood that a particular asteroid or comet may collide with Earth.
A:a scale developed by astronomers rates the likelihood that a particular asteroid or comet may
B:a scale that astronomers have developed rates how likely it is for a particular asteroid or comet to
C:astronomers have developed a scale to rate how likely a particular asteroid or comet will be to
D:astronomers have developed a scale for rating the likelihood that a particular asteroid or comet will
E:astronomers have developed a scale that rates the likelihood of a particular asteroid or comet that may.
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正确答案：
D:astronomers have developed a scale for rating the likelihood that a particular asteroid or comet will
考点：修饰
根据句意，主句主语一定为人，所以排除A，B。
E的双重定语从句过于繁琐，不选。
在C和D中选D
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