单项选择题

A．when
B．because
C．since
D．as
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单项选择题
A．betweenB．amongC．beyondD．without
A．between
B．among
C．beyond
D．without
单项选择题
A．whichB．thatC．whatD．whatever
A．which
B．that
C．what
D．whatever
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