单项选择题

The passage is mainly about ______.

A．energy resources saving
B．environment protection
C．population control
D．air pollution
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单项选择题
The author believes that carpooling ______.
A．can give help to those without cars
B．can save people money and time
C．can save energy resources and reduce air pollution
D．can promote the friendship among drivers
单项选择题
What was the main reason that almost destroyed Elizabeth's chances for becoming a doctor
A．She was a woman.
B．She wrote too many letters.
C．She couldn't graduate from medical school.
D．She couldn't establish her hospital.
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