单项选择题

When you talk, other people hear your voice ______.

A． throught the bones of your head
B． from the outside
C． from the inside
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单项选择题
Sound travels in the form (形式) of ______.
A． bones
B． air
C． waves
单项选择题
The best title (标题) would be ______.
A． Buses in England
B． Traffic in England
C． Traffic Lights in England
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