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

游客2025-05-09 6

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 realimtion of its full extent

答案 C

解析 not until结构位于句首时，主句部分需要倒装，选项C正确。

转载请注明原文地址:http://tihaiku.com/zcyy/4069056.html

相关试题推荐

随机试题

最新回复(0)

Thepeoplefortheexperimentwerechosencompletely______.A、atlengthB、iness