单项选择题

A．6 to 8 weeks.
B．Three months at most.
C．Six months at least.
D．One year old.
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单项选择题
A．250, 000 jobs.B．25, 000 jobs.C．2, 500, 000 jobs.D．2, 500 jobs.
A．250, 000 jobs.
B．25, 000 jobs.
C．2, 500, 000 jobs.
D．2, 500 jobs.
填空题
The concept of saving is said to be at least as old as
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