問題詳情

15.My roommate can fall asleep under any conditions, but I can’t get to sleep_____ the light is off and theroom is completely quiet.
(A) whether
(B) since
(C) although
(D)unless

參考答案

答案：D
難度：簡單0.722222
統計：A(1),B(1),C(3),D(13),E(0)