单项选择题

Our cities were damaged by ______.

A．pollution of local air
B．the breakup of the family
C．pollution of the earth' s atmosphere
D．the excessive growth of motors
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单项选择题
Which of the following is one example of our loss of morality
A．Lack of devotion.
B．Disregard for leaders.
C．Exploitation of resources.
D．Lack of cooperation.
单项选择题
It can be inferred from the passage that ______.
A．the energy crisis is similar to the natural disasters we had in the past
B．the problem of energy is the most serious problem our country is confronted with
C．the author is uninterested in the problems of our society
D．the author is particularly worried about the crises we are facing
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