問題詳情
40. Last night, Mike had trouble falling asleep although he knew he ___ get up early for the job interview.
(A) must
(B) has to
(C) had to
(D) must to
參考答案
答案：C
難度：適中0.541667
統計：A(5),B(3),C(13),D(3),E(0)
用户評論
【風鈴響】評論
must沒有過去式變化,唯一和過去有關的的是對過去的推測: must have been 的結構