单项选择题

How long can a brain keep alive without enough blood

A． Less than two minutes.
B． Not more than five minutes.
C． More than ten minutes.
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单项选择题
A．walkedB．steppedC．liftedD．stood
A．walked
B．stepped
C．lifted
D．stood
单项选择题
Where does the man think the keys are
A． In the woman’s car.
B． In the restaurant.
C． In the woman’s house.
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