Most of the big hotels in Shanghai were full last week But finally we find a room in a sm

问题补充：

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

答案：

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。