Director Gary Robertson’s latest film,《Frontiers》centers on the______of a young man who traveled to the American West in the 1850s, seeking fortune and fame.（）

______the Radio Communications Directory, there are 16,376 licensed radio stations currently broadcasting.（）

A．Due to
B．Taken by
C．Required by
D．According to

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The average______for a 2-bedroom apartment in Boulder, Colorado is $900 a month.（）

A．pay
B．size
C．rent
D．floor

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