In the United States, 30 percent of the adult (成年人) population has a “weight problem”. To many people, the case is clear: we eat too much. But scientific evidence（证据）does little to support the idea. Going back to the America of 1910, we find that people were thinner than today. Yet they ate m
ore food. In those days, people worked harder physically, walked more, used machines much less, and didn’t watch TV.
Several modern studies, moreover, have shown that fat people do not eat more on average (平均) than thinner people. In fact, some investigations (调查), such as a 1990 study of 3,545 London office workers, show that fatter people eat less than slimmer people.
Studies show that slim people are more active than fat people. A study by a research group of Stanford University School of Medicine found the following interesting facts:
The more the men ran, the more fat they lost.
The more they ran, the more they ate.
Thus, those who ran the most ate the most, yet lost 
the greatest amount of body fat.
小题1:What kind of physical problem do many adult Americans have?
A．They are too thin.
B．They work too hard.
C．They are too fat.
D．They lose too much fat.小题2:Which of the following words can take the place of the word “slim” in this passage?
A．poor
B．thin
C．healthy
D．rich小题3:Compared with the adult American population today, the Americans of 1910 ___
___.
A．ate more food and had more activities
B．ate less food but had more activities
C．ate less food and had less physical activities
D．had more weight problems小题4:What have modern medical and scientific researches reported to us?
A．Fat people eat less food and ar
e less active.
B．Fat people eat more food than slim people but are les
s active.
C．Fat people eat more food than slim people but are more active.
D．Thin people run less, but have greater increase in food intake.
