单项选择题

A．He moved into his own apartment.
B．He is always eating less than enough.
C．He is on a diet and exercises too much.
D．He smokes heavily every day.
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单项选择题
A．Automobile safety.B．Increasing fuel efficiency.C．California’s pollution laws.D．Electric-powered cars.
A．Automobile safety.
B．Increasing fuel efficiency.
C．California’s pollution laws.
D．Electric-powered cars.
单项选择题
A．Being able to do the field work.B．Specializing in one area.C．Knowing large areas generally.D．Being concerned about environmental problems.
A．Being able to do the field work.
B．Specializing in one area.
C．Knowing large areas generally.
D．Being concerned about environmental problems.
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