单项选择题

The class of mammals embraces nearly all warm-blooded animals except the birds.

A．takes on
B．takes over
C．takes in
D．takes up
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单项选择题
The doctor said that I had to eliminate alcohol.
A．cut out
B．cut on
C．cut in
D．cut up
单项选择题
The hill was once rich with iron.
A．abundant
B．destitute
C．enough
D．sufficient
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