2. 外语
  3. ______, many laws of nature actually exist.

______, many laws of nature actually exist.

admin2012-09-19  55
问题 ______, many laws of nature actually exist.
选项 A、Having not discovered
B、Not having discovered
C、Having not been discovered
D、Not having been discovered
答案D
解析 分词作状语时，否定词一般要放在分词前。本句的主语是many laws of nature，它也是分词短语的逻辑主语，它们之间的关系是完成被动关系，因此选D项。
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大学英语四级

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