单项选择题

It is estimated that, currently, about 50000 species become ______ every year.

A．extinct
B．instinct
C．distinct
D．intense
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单项选择题
John says that his present job does not provide him with enough ______ for his organizing ability.
A．scope
B．space
C．capacity
D．range
单项选择题
His wife has been ______ a lot of pressure on him to change his job.
A．taking
B．exerting
C．giving
D．pushing
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