单项选择题

Under what conditions can the EPA put off its action

A．No new regulations.
B．No new president and Congress.
C．No appropriate technology.
D．No swift proceeding.
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单项选择题
What will be the result of a more environmentally minded new president be in the place
A．The car industry will be benefited most and will be more profitable.
B．The congress will play less important role in regulating emissions.
C．The 40-year-old law the Clean Air Act will be abolished.
D．The dispute whether CO2 was an air pollutant will be settled.
单项选择题
According to the passage, a sense of humor______.
A．can be reflected in many ways
B．can make us avoid making mistakes
C．helps us lead a more healthy life
D．reminds us of the existence of tragedy
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