阿摩線上測驗
12. _____ the living environment clean is everybody’s responsibility.
(A) Keep
(B) Keeped
(C) Keeping
(D) Kept
答案：登入後查看
統計： A(10), B(2), C(40), D(1), E(0) #3912463
統計： A(10), B(2), C(40), D(1), E(0) #3912463
