Most of the big hotels in Shanghai were full last week, But finally we find a room in a small one.
A. ought to
B. could
C. were able to
D. might
网友回答
A. ought to
B. could
(答案→)C. were able to
D. might
解析：本题考查情态动词。句中考查be able to的过去形式were able to，表示成功的做某事。句意：上周在上海大多数旅馆都满了，但最终我们成功的在一家小旅馆里找到了一个房间。