About how many adult Americans have the "weight problem"? 1 percent.

填空题 In many people's opinion, what is the cause of getting fat? Eating 1.

填空题 Why were the Americans in 1910 thinner than today? Because they worked 1 physically.

填空题 What was the result of a recent study? Thinner people are more 1 than fatter people.

填空题 According to the passage, what happens to those who exercise regularly? They can eat more, and still lose a large amount of 1.