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Dan Buettner has studied five places around the world where residents are famed for their longevity: Okinawa in Japan, Nicoya in Costa Rica, Icaria in Greece, and Loma Linda in California and Sardinia in Italy.

People living in these so-called “blue zones” have certain factors in common—social support networks, daily exercise habits and a plant-based diet, for starters. But they share another unexpected commonality. In each community, people are gardening well into old age—their 80s, 90s and beyond.

It is well-known that an outdoor lifestyle with moderate physical activity is linked to longer life, and gardening is an easy way to accomplish both. “If you garden, you’re getting some low-intensity physical activity most days, and you tend to work routinely,” says Buettner. He says there is evidence that gardeners live longer and are less stressed. A variety of studies confirm this, pointing to both the physical and mental health benefits of gardening.

If gardening is good, is farming even better? Many of the lifestyle factors associated with longevity, such as living in the country and getting lots of exercise, apply to farmers as well. Some evidence suggests that farming is one of the healthiest occupations.

However, neither farming nor gardening will ultimately guarantee a longer lifespan. But some of the lifestyle factors associated with both, namely going outside, engaging in light physical activity and eating a healthy plant-based diet, just might.

1.Which of the following is not the commonality of people living in blue zones?

A Social support networks.

B Daily exercise habits.

C Gardening.

D Reading books.

解析：选D。细节理解题。根据第二段可知只有读书不是生活在“蓝色地带”的人们的共性，故选D。

2.Who live longer and less stressed according to Buettner?

A Workers.

B Farmers.

C Gardeners.

D Teachers.

解析：选C。细节理解题。根据第三段倒数第二句He says there is evidence that gardeners live longer and are less stressed.可知Buettner称园艺师活得更久，且压力更小，故选C。

3.Which word can take place of “occupations”?

A Jobs.

B Dreams.

C Sports.

D Habits.

解析：选A。词义猜测题。根据第四段中提到的gardening和farming等词我们可以猜测它们是职业，只有job有此意，故选A。

4.What can we know from the last paragraph?

A Farming will guarantee a longer lifespan.

B Gardening will guarantee a longer lifespan.

C Longevity is associated with farming or gardening.

D Longevity isn’t associated with farming or gardening.

解析：选C。推理判断题。最后一段主要讲了农耕和园艺与长寿之间的关系，故选C。