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The young boy has come to himself in hospital now. But he ___ unconscious for three days.
A.has beenB.wasC.had beenD.is
B

试题分析:句意:这个小男孩现在在医院苏醒了,但是他有三天失去意识。从前面的句子,说明他失去意识是过去的事情,所以用一般过去式,选B。
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