单项选择题

Fifty miles ______ not a long distance.

A．were
B．are
C．is
D．been
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单项选择题
They won't buy any new clothes because they ______ money to buy a new car.
A．save
B．were saving
C．have saved
D．are saving
单项选择题
In some countries, ______ are called public schools are not owned by the public.
A．which
B．that
C．as
D．what
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