[单项选择]

A new study found that inner-city kids living in neighborhoods with more green space gained about 18% less weight over a two-year period than kids living amid more concrete and fewer trees. Such (1) tell a powerful story. The obesity epidemic began in the 1980s, and many people (2) it to increased portion sizes and inactivity, but that can’t be everything. Fast foods and TVs have been (3) us for a long time. "Most experts agree that the changes were (4) to something in the environment," says social epidemiologist Thomas Glass of The Johns Hopkins Bloomberg School of Public Health. That something could be a (5) of the green.
The new research, (6) in the American Journal of Preventive Medicine, isn’t the first to associate greenery with better health, but it does get us closer (7) identifying what works and why. At its most straightforward, a green neighborhood (8) means more place
A. relieved
B. delegated
C. approved
D. performed

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