单项选择题
Penguins do not suffer from the cold in Antarctica because their feathers
secrete
protective oil.
A．hide
B．warm
C．produce
D．absorb
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单项选择题
The industrial revolution modified the whole structure of English society.()
A. destroyed
B. broke
C. smashed
D. changed
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单项选择题
The boys broke into excited cheering. ()
A. burst
B. blasted
C. burned
D. blazed
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