填空题

Contrary to popular wisdom,eating at McDonald’s isn’t exactly cheap, costing some $ 28 for a family of four. This might help (47) the results of a recent study from the University of California, Davis.
The researchers found that people visited fast-food restaurants more often as their (48) income increased--at least up to a point. Fast-food visits rose along with annual income up to $ 60,000; beyond that, visits started to drop back down, (49) by full-service,sit-down dining at slightly higher prices.
The authors said their study suggests that the availability of fast food isn’t the only (50) of obesity in poor groups. "There is a correlation between obesity and lower income, but it cannot be (51) attributed to restaurant choice," said J. Paul Leigh, professor of public health sciences at U. C. Davis.
For many years,the connection between poverty and obesity has been linked in part to the (52) of fast food in low-income areas. While the current study (53) the notion that poorer people eat more fast food than those who are (54) off, it doesn’t absolve fast-food restaurants completely. The study didn’t take into consideration what people ate outside of restaurants, for example, and it’s well established that low-income neighborhoods tend to be "food deserts"-- where fresh,whole foods are (55) and where the bulk of available food is the high-fat,high-sugar stock of convenience stores. That type of environment is thought to (56) to unhealthy eating and weight gain.
A. abundance I) explain
B. altered J) household
C. better K) likely
D. challenges L) lonely
E. contribute M) replaced
F. driver N) scarce
G. encourage O) solely
H) establishment

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