问题
选择题
The young boy has come to himself in hospital now. But he ___ unconscious for three days.
A．has been
B．was
C．had been
D．is
答案
答案：B
题目分析：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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