单项选择题

A) within C) for
B) during D) by

A．within
B．during
C．for
D．by
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单项选择题
A) remaining C) providedB) existing D) available
A．remaining
B．existing
C．provided
D．available
单项选择题
A) days C) monthsB) weeks D) times
A．days
B．weeks
C．months
D．times
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