单项选择题

This passage is mainly about ______.

A．the definition of bacteria
B．health germs
C．probiotics
D．probiotics versus antibiotics
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单项选择题
Some people dislike fairy stories because they feel that they ______.
A．tempt people to be cruel to children
B．show the primitive cruelty in children
C．lend themselves to undesirable experiments with children
D．increase a tendency to sadism in children
单项选择题
According to this passage, ______may result in the imbalance of bacteria in your intestines.
A．antibiotic treatment for an ear infection
B．taking pills which contain freeze-dried germs
C．eating yogurt or buttermilk
D．eating products made from fermented milk
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