单项选择题

Primary batteries or cells are _______ , once discharged, are discarded.

A．those
B．those that
C．that
D．that they
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The Rocky Mountain goat of North America is not a tree goat _______ a goat antelope.
A．and
B．but
C．any
D．yet
单项选择题
Western Nebraska generally receives less snow than _______ eastern Nebrask
A． doesB. inC. it does inD. in it does
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