单项选择题

A．The threat of poisonous desert animals and plants.
B．The exhaustion of energy resources.
C．The destruction of oil wells.
D．The spread of the black powder from the fires.
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单项选择题
A．Her son.B．Her brother. .C．Her father.D．Her nephew.
A．Her son.
B．Her brother. .
C．Her father.
D．Her nephew.
单项选择题
A．The woman feels sorry for the man.B．The man is a member of the staff.C．The area is for passengers only.D．The woman is asking the man to leave.
A．The woman feels sorry for the man.
B．The man is a member of the staff.
C．The area is for passengers only.
D．The woman is asking the man to leave.
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