阿摩線上測驗
20. Only after the meeting _____ how serious the situation was.
(A) they realized
(B) had they realize
(C) they did realize
(D) did they realize
答案：登入後查看
統計： A(45), B(47), C(23), D(109), E(0) #3426229
統計： A(45), B(47), C(23), D(109), E(0) #3426229
