阿摩線上測驗
15. My roommate can fall asleep under any conditions, but I can’t get to sleep_____ the light is off and the
room is completely quiet.
(A) whether
(B) since
(C) although
(D)unless
答案：登入後查看
統計： A(2), B(13), C(6), D(175), E(0) #923643
統計： A(2), B(13), C(6), D(175), E(0) #923643
