单项选择题

Questions 17—20 are based on the following passage.
According to Mr. Tait, what should we do to improve the situation of tooth decay

A．Spend more money in fighting tooth decay.
B．Have better education.
C．Improve people’s standard of living.
D．Get rid of some of our teeth.

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单项选择题

单项选择题

Questions 17—20 are based on the following passage. According to Mr. Tait, what should we do to improve the situation of tooth decay 您的浏览器不支持 audio 元素。