单项选择题


Filters and low tar tobacco make smoking safe．

A．Right
B．Wrong
C．Not mentioned
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单项选择题
A．another B．other C．each otherD．one another
A．another
B．other
C．each other
D．one another
单项选择题
Nicotine is poisonous
A．Right
B．Wrong
C．Not mentloned
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