单项选择题

A．Environmental pollution and protection.
B．Taxes and services for the public.
C．Police efforts to protect people.
D．People’’s attitude toward taxes.
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单项选择题
A．Physician.B．Psychologist.C．Fictional writer.D．Historian.
A．Physician.
B．Psychologist.
C．Fictional writer.
D．Historian.
单项选择题
A．dangerousB．hardC．excitingD．dull
A．dangerous
B．hard
C．exciting
D．dull
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