单项选择题

A．whether
B．that
C．which
D．why
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单项选择题
A．rarelyB．fullyC．abundantlyD．fairly
A．rarely
B．fully
C．abundantly
D．fairly
单项选择题
A．partly becauseB．mainly becauseC．not becauseD．not because of
A．partly because
B．mainly because
C．not because
D．not because of
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