There was a big fire in the building last night. all the people were able to escape.A. U

问题补充：

There was a big fire in the building last night. , all the people were able to escape.

A. Unluckily

B. Fortunately

C. To be sure

D. Above all

答案：

A. Unluckily

(答案→)B. Fortunately

C. To be sure

D. Above all

解析：考查副词：A. Unluckily不幸的B. Fortunately幸运的C. To be sure确切的D. Above all最重要的是,句意：昨晚大楼里起火了幸运的是，所有的人都逃脱了。选B。