阿摩線上測驗
16. Remember _____ all the doors and windows or someone may come in and steal things.
(A) lock
(B) to lock
(C) locking
(D) must lock
答案：登入後查看
統計： A(13), B(187), C(31), D(6), E(0) #3347642
統計： A(13), B(187), C(31), D(6), E(0) #3347642
