問題詳情
Hehasbeenstudyinginthelibraryeverynight_____thelastthreemonths.
(A)since
(B)for
(C)until
(D)before
參考答案
答案：B
難度：適中0.573276
統計：A(84),B(133),C(4),D(5),E(0)
用户評論
【Sherry Yeh】評論
He has been studying in the library every night_____the last three months. (A)since (B)for (C)until (D)before