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
网友回答
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。