单项选择题

A．To restore the normal production of the oil wells.
B．To estimate the losses caused by the fires.
C．To remove the oil left on the surface of the desert.
D．To use the oil left in the oil lakes.
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单项选择题
A．Getting some food for the guard.B．Opening the door from the outside.C．Getting the key and opening the door.D．Escaping from the prison.
A．Getting some food for the guard.
B．Opening the door from the outside.
C．Getting the key and opening the door.
D．Escaping from the prison.
单项选择题
A．When the plane is in danger.B．During test flights in the air.C．When all the engines suddenly go wrong.D．During test flights in the lab.
A．When the plane is in danger.
B．During test flights in the air.
C．When all the engines suddenly go wrong.
D．During test flights in the lab.
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