单项选择题

There are three types of volcanoes; active volcanoes, dormant volcanoes and ______ volcanoes.

A．extinguished
B．extinct
C．distinct
D．instinctive
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单项选择题
I can't bear the noise of my brother's radio; it ______ me from my work.
A．disturbs
B．perturbs
C．interrupts
D．distracts
单项选择题
Not until an infant hedgehog opens its eyes ______ its nest to follow its mother about.
A．it leaves
B．and leaves
C．leaving
D．does it leave
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