单项选择题

A．2.
B．1.
C．none.
D．3.
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单项选择题
A．About half of them are old.B．About half of them are quite young.C．less than one quarter of them are young.D．About one quarter of them are above 60.
A．About half of them are old.
B．About half of them are quite young.
C．less than one quarter of them are young.
D．About one quarter of them are above 60.
单项选择题
A．Wait for the manager.B．Give a message to the manager.C．Write a note to the manager.D．Come back at a later tim
A．Wait for the manager.
B．Give a message to the manager.
C．Write a note to the manager.
D．Come back at a later tim
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