单项选择题

Customers often defer payment as long as possible.

A．make
B．demand
C．obtain
D．postpone
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The leading astronomers of the sixteenth and seventeenth centuries were fascinated by comets.
A．intrigued
B．infected
C．inconvenienced
D．inclined
单项选择题
France has kept intimate links with its former African territories.
A．private
B．friendly
C．strong
D．secret
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