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
When the companies make decisions, _______.
A．they often ignore the well-being of the people involved
B．they may consider the benefits of the employees who had contributed a lot to the companies
C．they need not be responsible for the dismissed employees
D．they don't want 1o be considered as ethical
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.
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