单项选择题

A．50.
B．40,000.
C．3200.
D．450.
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单项选择题
A．5 months.B．6 months.C．12 months.D．32 months.
A．5 months.
B．6 months.
C．12 months.
D．32 months.
单项选择题
A．They are still very safe.B．They have been rescued by the US army.C．They have been killed.D．Nobody knows exactly what has happened to them.
A．They are still very safe.
B．They have been rescued by the US army.
C．They have been killed.
D．Nobody knows exactly what has happened to them.
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