题目内容

–What has happened to Jack?
–He’s had one of his legs _____trying to save a boy from the fire.
A．injuringB．injuredC．being injuredD．to be injured
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。
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