单项选择题

It is obvious that these small businesses are ______ need of technical support.

A．in
B．on
C．with
D．to
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单项选择题
I m sorry to tell you that the materials you wanted are ______.
A．taken off
B．put up
C．sold out
D．got off
单项选择题
Our company s service is ______ in nearly 80 countries around the world.
A．available
B．natural
C．relative
D．careful
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