单项选择题

Penguins do not suffer from the cold in Antarctica because their feathers secrete a protective oil.

A．hide
B．warm
C．produce
D．absorb
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Did anyone call when I was out
A. everyone
B. someone
C. nobody
D. anybody
单项选择题
Jack was dismissed.()

A. fired.
B. fined
C. exhausted
D. criticized
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