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．Getting up. earlier.B．Making an appointment.C．Going to the bookstore.D．Not going to school.
A．Getting up. earlier.
B．Making an appointment.
C．Going to the bookstore.
D．Not going to school.
单项选择题
The moral decline of American society is caused manly by ______.
A．its growing wealth
B．the self-centeredness of individuals
C．underestimating the impact of social changes
D．the prejudice against women and minorities
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