11.the physical problem that many a

11.the physical problem that many adult Americans have is that-----A.they are too slim.B.they work too hard.C.they are too fat.D.they lost too much body fat.12.According to the article,given 500 adult Americans,-------will have a weight problem?A.30B.50C.100D.15013.is there any scientific evidence to support that 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 that.D.we don't know because the information is not given.14.in comparison with the adult American population today ,the Americans of the 1910s -----.A.ate more food and had more physical activities.B.ate less food but had more activities.C.ate less food and had less physical exercise.D.had more weight problems15.modern scientific researchers have reported to us that---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.