The more the men ran, the greater loss of body fat.
The more they ran , the greater their increase in food intake ( 吸收 ) .
Thus those who ran the most ate the most, yet lost greatest amount of body fat .
26. What kind of physical problem do many adult Americans have?
A. They are too slim. B. They work too hard.
C. They are too fat. D. They lose too much body fat.
27. Is there scientific evidence to support eating too much is the cause of a “weight problem”?
A. Yes, there is plenty of evidence.
B. Of course, there is some evidence to show this is true.
C. There is hardly any scientific evidence to support this.
D. We don't know because the information is not given.
28. In comparison ( 比较 ) with the adult American population today , the Americans of 1910 ____ .
A. ate more food and had more physical activities
B. ate less food but had more activities
C. are less food and had less physical exercises
D. had more weight problems
29. What have modern medical and scientific researches reported to us .
A. Fat people eat less food and are less active .
B. Fat people eat more food than slim people and are more active .
C. Fat people eat more food than slim people but are less active .
D . Thin people run less， but have greater increase in food intake .