阿摩線上測驗
19. You cannot play video games _____ you finish your homework.
(A) while
(B) because
(C) until
(D) if
答案：登入後查看
統計： A(5), B(8), C(187), D(6), E(0) #3328193
統計： A(5), B(8), C(187), D(6), E(0) #3328193
