The fire spread through the hotel very quickly but everyoneget out.A. had to B. wouldC. wa

问题补充：

The fire spread through the hotel very quickly but everyoneget out.

A. had to

B. would

C. was able to

D. could

答案：

A. had to

B. would

(答案→)C. was able to

D. could

解析：考查情态动词的基本含义。had to：不得不； would：表示意愿或过去常常；could倾向于表示经过长期训练而获得的能力；was able to 表示经过努力而能够做到的事或成功地做了某事。因此，答案是C。