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

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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

单项选择题

Which of the following is mentioned as one of the causes of bad breath

A．Tooth trouble.
B．Sulfur-rich food.
C．Too much exercise.
D．Mental strain.