单项选择题

A．The underground oil resources have not been affected.
B．The underground water resources have not been polluted.
C．The oil lakes soon dried up and stopped evaporating.
D．Most of the desert animals and plants have managed to survive.
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单项选择题
A．To be excused.B．To be a free man in the prison.C．To be helped out of the prison.D．To explain the mistakes he had made.
A．To be excused.
B．To be a free man in the prison.
C．To be helped out of the prison.
D．To explain the mistakes he had made.
单项选择题
A．To see what would happen if the plane exploded in the water.B．To see how much air passengers need to breathe at certain altitudes.C．To find out if there are any weak parts that would burst under pressure.D．To find out how much air can be pumped into a plane.
A．To see what would happen if the plane exploded in the water.
B．To see how much air passengers need to breathe at certain altitudes.
C．To find out if there are any weak parts that would burst under pressure.
D．To find out how much air can be pumped into a plane.
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