动才能受益。

　　5．The three groups in Church's study .

　　A．were of different ages

　　B．were required to walk slowly

　　C．were in different physical condition

　　D．were required to do different exercises

　　解析：选B　细节理解题。由第四段末的"These women were walking slowly, and could easily carry on a conversation."可知。

　　6．At the end of Church's study, women in the first group .

　　A．lost weight　　　　　 B．lost belly fat

　　C．benefited little D．benefited the most

　　解析：选B　细节理解题。由第五段中的"their pants fit differently. It's because they have less belly fat ..."可知。

　　C

　　Soda (苏打汽水), while sweet and inexpensive, may not be worth drinking. Sugary drinks can have many bad health effects, including a 26% greater risk of diabetes (糖尿病) for regular soda drinkers. And men drinking one can of sugary drinks per day have a 20% higher risk of having or dying from a heart attack than those who rarely drink them. The health effects of drinking soda also affect pre­school children, heightening their chances of becoming obese at a very young age. According to Harvard School of Public Health, one in three children in America are obese or overweight, and childhood obesity has tripled (增至三倍) in the last 30 years. Should government get people to reduce their drinking of soda and sugary drinks due to health effects?

People in San Francisco were given the opportunity to voice their opinion on Proposition E, which suggested a soda tax (税). The tax, which needed to pass with a two­thirds majority, would have provided money for health and physical education programs, and the hope was that it would also discourage citizens from buying unhealthy drinks. Although San Francisco's Proposition E failed to be passed, Berkeley citizens succeeded in passing the nation's first ever sugary drink tax on their