298] Though , many laws of nature exist. [译文] 尽管没有被发现.但是许多自然规律是存在的. A. not having been discovered B. having not been discovered C. not having discovered D. having not discovered [答案及简析] A. 连词加现在分词短语作状语,此句等于:Though the laws of nature have not been discovered 【查看更多】
