問題詳情

【題組】19. Ted won’t be home until midnight. By the time he gets back I _____ for two hours.
(A) will sleep
(B) was sleeping
(C) will have been sleeping
(D) had slept

參考答案

答案：D[無官方正解]
難度：適中0.583333
統計：A(1),B(2),C(2),D(7),E(0)