单项选择题

They decided to chase the cow away _____ it did more damage.

A．unless　
B．until　
C．before　
D．although
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单项选择题
A library with five thousand books _____ to the nation as a gift.
A．is offered　
B．has offered　
C．are offered　
D．have offered
单项选择题
We wanted a new table for dinner, so my father bought _____ from a furniture store yesterday.
A．itself　
B．one　
C．himself　
D．another
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