in the leg made it impossible for me to walk as fast as usual.
A. Being injured
B. To be injured
C. Having injured
D. Injured
网友回答
(答案→)A. Being injured
B. To be injured
C. Having injured
D. Injured
解析：句意：腿受伤使我不可能走得像平常一样快。容易得知腿是被受到伤害了，故需要用injure的被动式。又因为整个动词短语要做句子的主语，由于只有动名词才可做主语，应当用被动语态的动名词形式being injured做主语。故选A。