问题补充：
The fire spread through the hotel very quickly but everyone get out .
A. had to
B. would
C. could
D. was able to
答案：
A. had to
B. would
C. could
(答案→)D. was able to
解析：could 与 was able to 的区别，was able to 除了与 could 一样表示“能……”外，还有如下意义：managed to do sth 或 succeeded in doing sth , 意即成功地做了某事、设法做成了某事。根据语境，显然选D。
