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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单项选择题
The community college is the most rapidly growing segment of higher education in the United States.
A．core
B．idea
C．sector
D．problem
单项选择题
The city of New Orleans showed its appreciation for Eleanor McMain's work in social reform by giving her the Times-Picayune award for out-standing service in 1920.
A．demonstrated
B．published
C．repeated
D．postponed
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