单项选择题

Is a dog ______ animal

A．the
B．an
C．/
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单项选择题
The horse is getting old and cannot run ______ it did.
A．as fast as
B．as faster as
C．as faster than
单项选择题
Mary likes playing ______ piano while David is interested in listening to ______ music.
A．the; the
B．the; /
C．/; the
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