单项选择题

A．More buffalo are surviving the winter.
B．Fewer buffalo are dying of disease.
C．More buffalo are being born,
D．Fewer buffalo are being killed by hunters.
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A．Looking at some photographs.B．Selling cameras.C．Teaching a photography class,D．Repairing camera equipment,
A．Looking at some photographs.
B．Selling cameras.
C．Teaching a photography class,
D．Repairing camera equipment,
单项选择题
A．A vacation trip to Yellow Stone Park.B．A lecture by a visiting professor.C．Her biology thesis.D．A research project.
A．A vacation trip to Yellow Stone Park.
B．A lecture by a visiting professor.
C．Her biology thesis.
D．A research project.
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