Not until Kentucky’s Mammoth Cave had been completely explored in 1972_____.A、wh

游客2025-04-09 44

问题 Not until Kentucky’s Mammoth Cave had been completely explored in 1972_____.

选项 A、when was its full extent realized
B、that its full extent realized
C、was its full extent realized
D、the realization of its full extent

答案 C

解析空格处的意思是：直到肯塔基州的猛犸洞在1972年完全勘探完毕，它的范围才全面被了解。本题not until结构位于句首时，主句部分需要倒装，应选择C。

转载请注明原文地址:https://www.tihaiku.com/zcyy/4032682.html

相关试题推荐

随机试题

最新回复(0)

Theyusedtoquarrelalot,butnowtheyarecompletely______witheachother.A、r