单项选择题

If nothing is done to protect the environment, millions of species that are alive today will have become （）

A．deteriorated
B．degenerated
C．suppressed
D．extinct

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单项选择题
No one imagined that the apparently （）businessman was really a criminal.

A．respective
B．respectable
C．respectful
D．realistic
单项选择题
We must look beyond （）and assumptions and try to discover what is missing..

A．justifications
B．illusions
C．manifestations
D．specifications
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