阿摩線上測驗
4. I know this is hard, but you must go ______ to succeed.
(A) off
(B) at
(C) to
(D) on
(A) off
(B) at
(C) to
(D) on
答案：登入後查看
統計： A(25), B(12), C(11), D(289), E(0) #3293287
統計： A(25), B(12), C(11), D(289), E(0) #3293287
