阿摩線上測驗
18. I wonder _____ you wash your car. Once a week?
(A) how
(B) how long
(C) how come
(D) how often
答案：登入後查看
統計： A(3), B(38), C(5), D(286), E(0) #3156187
統計： A(3), B(38), C(5), D(286), E(0) #3156187
