单项选择题

Below 600 feet ocean waters range from dimly lit to completely dark.

A．inadequately
B．hardly
C．faintly
D．sufficiently
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单项选择题
She has such exceptional abilities that everyone is jealous of her.
A．regular
B．specific
C．extraordinary
D．rare
单项选择题
The old concerns lose importance and some of them vanish altogether;
A．disappear
B．develop
C．linger
D．renew
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