单项选择题

There are no solitary, free-living creature; every form of life is ______ other form.

A．parallel to
B．dependent on
C．segregated from
D．overlapped with
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单项选择题
Reading became difficult for the old man, so the optician ______ glasses.
A．prescribed
B．subscribed
C．inscribed
D．described
单项选择题
No one really knows who composed this piece of music, but it has been ______ to Bach.
A．referred
B．attributed
C．identified
D．associated
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