单项选择题

A．Nicotine.
B．Nitrosamine.
C．Tar.
D．Carbon monoxide.
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单项选择题
A．Because a lot of people have bought that.B．Because she wants to show it off towards others.C．Because it will be of great help to her.D．Because she can finish her homework easily by using it.
A．Because a lot of people have bought that.
B．Because she wants to show it off towards others.
C．Because it will be of great help to her.
D．Because she can finish her homework easily by using it.
单项选择题
A．Violence.B．Peace.C．War.D．Demonstrations.
A．Violence.
B．Peace.
C．War.
D．Demonstrations.
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