单项选择题

The dog's ears ______ when it ran.

A．flopped
B．flipped
C．fluttered
D．flapped
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单项选择题
Few people know him,______
A．do they
B．don't they
C．doesn't few
D．don't few
单项选择题
Everything is ready, ______
A．isn't it
B．aren't they
C．is it
D．are they
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