单项选择题

Though he was almost ninety years old, he was still alive and ______.

A．alert
B．grave
C．elegant
D．persistent
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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
单项选择题
Some workers find it hard to ______ themselves to the new working conditions.
A．suit
B．accommodate
C．cater
D．furnish
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