阿摩線上測驗
30.
All employees are to refrain from using the elevators, and to move to the designed emergency exits in the
event that the alarm _______.
(A) be rung
(B) rings
(C) ringing
(D) to ring
答案：登入後查看
統計： A(1), B(8), C(5), D(1), E(0) #3327758
統計： A(1), B(8), C(5), D(1), E(0) #3327758
