单项选择题

A．By the end of this century.
B．By the first half of this century.
C．By the second half of this century.
D．In the middle of this century.
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单项选择题
A．A retirement party.B．A faculty reception.C．A class reunion.D．A birthday party.
A．A retirement party.
B．A faculty reception.
C．A class reunion.
D．A birthday party.
填空题
E
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