–What has happened to Jack?
–He’s had one of his legs trying to save a boy from the fire.
A. injuring
B. injured
C. being injured
D. to be injured
网友回答
A. injuring
(答案→)B. injured
C. being injured
D. to be injured
解析：考察固定结构。Have sth done使…被做；injure受伤；结合句意可知B正确。句意：—Jack怎么了？—在努力从大火中救孩子的时候，他的而已条腿受伤了。