问题补充:
Most of the big hotels in Shanghai were full last week, but finally wefind 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:句意,上周,上海的大多数大的宾馆都满了,但是最后,我们找了一间小的。表示过去通过努力终于做成了某事要用beableto,而不能用can,又因为是发生在过去的事情,故用一般过去时。