19. Not until Kentucky’s Mammoth Cave had been^completely explored in 1972 _____.
(A) when was its full extent realized
(B)was its full extent realized
(C) that its full extent was realized
(D)the realization of its full extent
私人筆記 (共 2 筆)
未解鎖
Not until放在句首要倒裝 原句:...
未解鎖
直到 1972 年肯塔基州的馬莫斯洞穴...
阿摩線上測驗
登入
