单项选择题

The new system will allow the suffix of a Web address to be expressed by（）

A．any native language
B．figures and numbers
C．Chinese characters
D．symbols and signs

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单项选择题
The service of sending and returning books by post is（）

A．not available to children
B．paid by the users
C．free of charge
D．not provided
单项选择题
Calibre library provides service mainly for people who suffer from（）

A．hearing difficulties
B．mental illnesses
C．sight problems
D．heart troubles
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