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

For the past few years Susan had been _______ her income by the creation of fiction under a pen name.

A．extending
B．magnifying
C．exceeding
D．supplementing

单项选择题

Experts _______ that this sort of animal will not attack a human being unless it is in predicament.

A．conform
B．conflict
C．contradict
D．confirm

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