2. 外语
  3. Obesity has become a household word in the United States. Today, about one【C1】______ three American kids is overweight, nearly【C

Obesity has become a household word in the United States. Today, about one【C1】______ three American kids is overweight, nearly【C

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问题     Obesity has become a household word in the United States. Today, about one【C1】______ three American kids is overweight, nearly【C2】______the rate in 1963. Childhood obesity is the No. 1 health【C3】______among American parents, topping drug abuse and smoking. Obesity is among the easiest medical conditions to recognize but most difficult to treat. Unhealthy weight gain due to poor diet and lack of exercise【C4】______over 300,000 deaths annually.
    Obesity is causing a broad range of health problems that【C5】______weren’t seen until adulthood, including high blood pressure. There are also psychological effects: Obese children are more【C6】______to low self-esteem, negative body image and depression. They are much more likely to become overweight adults【C7】______they maintain healthier【C8】______of eating and exercise.
    The causes of obesity are extremely complicated. Obesity occurs when a person eats more calories than【C9】______. If one parent is obese, there is a 50 percent chance that their children will be obese.【C10】______certain medical disorders can cause obesity, less than 1 percent of all obesity arises from physical problems.
【C2】
选项 A、triple
B、couple
C、topple
D、sample
答案A
解析 triple：是……三倍；couple：伴随(with)；topple：坍塌；sample：样品， 把……当作样品。此选项涉及倍数的表达法，而这正是国内学生感到头痛的地方。倍数词可直接接量词，不要使用of连接，如a room about twice the size of my dorm，an old man three times her age，read at twice my speed或a circle twice the diameter of a basketball。
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