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

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单项选择题

How many years passed by between her graduation from medical school and opening her hospital

A．8.
B．10.
C．19.
D．36.

单项选择题

All of the following are the first in the life of Elizabeth Blackwell, except that ______.

A．she became the first female physician
B．she was the first woman surgeon
C．she founded the first hospital for women and children
D．she established the first medical school for women