问题
选择题
–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
答案
答案：B
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。