单项选择题

Water has become "cool" in the Minneapolis school district partly because ______.

A．water is provided free
B．most kids can afford nothing but water
C．water machines are put in noticeable positions
D．children have realized the harm of sugary drinks

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单项选择题

By mentioning the 1964 report on smoking, Jeffrey Koplan implied that ______.

A．more children tend to smoke today than yesterday
B．both obesity and smoking require the attention of schools and society
C．the present plan on obesity would function similarly as a landmark
D．obesity and smoking are both health problems

单项选择题

The word bug used in Paragraph 5 means ______.

A．a bacterium
B．a cold
C．a flu
D．a virus