阿摩線上測驗
17. Helen _____ been teaching French in Taiwan for several years before she moved to Paris.
(A) has
(B) have
(C) had
(D) was
答案：登入後查看
統計： A(45), B(7), C(151), D(3), E(0) #3328191
統計： A(45), B(7), C(151), D(3), E(0) #3328191
