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
D．it affects the normal flow of saliva
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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
The underlined phrase emanate from in (Sent. 2, Par
A．1) most probably means" _______".A. thrive onB. account forC. originate fromD. descend from
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