单项选择题

Continuous short buzzes on the telephone indicate that the line is busy after you dial the telephone number.

A. open
B. out of order
C. disengaged
D. in use
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France has kept intimate links with its former African territories.
A．friendly
B．private
C．strong
D．secret
单项选择题
My relationship .with the actors is fundamental to my work as a director.()

A. impressive
B. public
C. essential
D. slight
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