单项选择题

21（）

A．first
B．second
C．third
D．the last

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单项选择题
What can help us know what is going on in the world
A．Books.
B．newspapers.
C．TV and radios.
D．A,B,C and others.
单项选择题
The best title for this short passage is ______.
A．Signs Carry Messages
B．The Importance of Communication
C．Words, Signs and Drawings
D．Ways of Communication
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