单项选择题

One of the newer conservation projects undertaken by the state of Oklahoma involves flood prevention.

A．topics
B．programs
C．concerns
D．schools
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单项选择题
In 1845 Sarah Mather invented a submarine telescope that could be used to locate and study underwater objects.
A．illuminate
B．raise
C．find
D．examine
单项选择题
Current hiring policies in the United States seek to provide equal employment opportunities for women and minority groups.
A．furnish
B．demand
C．confirm
D．continue
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