单项选择题

According to the passage, alcohol has something to do with bad breath mainly because______.

A．it keeps offending bacteria from reproducing
B．its smell adds to bad breath
C．it kills some helpful bacteria
D．it affects the normal flow of saliva
<上一题 目录 下一题>
热门 试题

单项选择题
We can infer from this passage that ______.
A．offensive breath can't easily be cured
B．elderly people are less offended by bad breath
C．heavy drinkers are less affected by bad breath
D．offensive breath is less affected by alcohol
单项选择题
Mouthwashes are not an effective cure for bad breath mainly because.
A．they can't mask the bad odor long enough
B．they can't get to all the offending bacteria
C．their strong smell mixes with bad breath and makes it worse
D．they can't cover the thick layers of mucus
相关试题