单项选择题

--You're not a freshman, are you --______, I am a second-year student.

A．Yes, I'm not
B．No, I am
C．No, I'm not
D．Yes, I am
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单项选择题
Many countries face some serious problems of land use, ______ result from population growth and the demands of modem technological living.
A．which most
B．most of which
C．most which
D．of most which
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