Though______, many laws of nature exist.

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问题 Though______, many laws of nature exist.

选项 A、not having been discovered
B、having not been discovered
C、not having discovered
D、having not discovered

答案A

解析本题考查分词短语作状语。此句为连词加现在分词短语作状语，等于：Though the laws of nature have not been discovered，many laws of nature exist。

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成人本科学位英语

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