单项选择题

The remarkable _______ of life on the Galapagos Island inspired Charles Darwin to establish his theory of evolution.

A．classification
B．density
C．diversity
D．purification
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单项选择题
Her face brightened up when she saw her long-awaited friend _______.
A．turning off
B．turning away
C．turning in
D．turning up
单项选择题
He went ahead with unpopular changes, _______ to hostile criticism.
A．opposed
B．indifferent
C．sensible
D．contrary
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