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tohospitalintime,thewoundedsoldiersweresavedatlastA,havingtakenB,beingtakenC,takenB是被动一般式吗?A表示已发生,是先被送然后才被救啊为什么不选?

题目详情
_to hospital in time,the wounded soldiers were saved at last
A,having taken
B,being taken
C,taken B是被动一般式吗?A表示已发生,是先被送然后才被救啊为什么不选?
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答案和解析
the wounded soldiers 是被送往医院,如果选A,应该改为having been taken ,表被动形式.这个答案可省略为taken,故此题答案为C.B不能选,原因状语从句中没有being done这种结构.一般只有动词短语做主语时才有这种结构,如:Being exploded to the sun for a long time is not good.