单项选择题

Nearly ______ of the earth ______ covered by se

a．A．there fourth；is
B．three fourths；is
C．three fourth；are
D．three fourths；are
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单项选择题
I ______ I would win the first prize of the competition.
A. wish
B. hope
C. think
D. believe
单项选择题
心理学作为一门独立学科诞生于( )年。
A．1789
B．1798
C．1879
D．1897
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