阿摩線上測驗
5. The woman who is standing at the door ______ my mother.
(A) am
(B) is
(C) being
(D) was
答案：登入後查看
統計： A(6), B(275), C(29), D(17), E(0) #3293288
統計： A(6), B(275), C(29), D(17), E(0) #3293288
