81. At the beginning of the passage, the author is trying to draw our attention to ____.

1. poverty, poor job prospects and stress as risk factors of heart attacks
2. a more important factor for heart attacks
3. heart attacks in later life
4. All of the above.

82. From the passage we can say that Smith agrees with Barker on ____.

1. the close link between undernourishment and small babies
2. the tendency of small babies to smoke in the future
3. the influence of social factors on babies
4. the effect of low weight

83. The research conducted by Smith, Frank and others at Bristol ____.

1. indicated the tendency of men aged 45 and 59 to have heart attacks
2. provided the same results in terms of the effect of low birth weight
3. proved the conventional risk factors for heart attacks
4. showed a high incidence of heart attacks in thin men

84. Smith's team found that ____.

1. heart attacks were more likely to occur in obese adults who were small at birth
2. heart attacks did not happen in thin adults who were small at birth
3. people who were born small would grow fat as adults
4. people who were born small would stay thin as adults

85. Barker does not agree with Smith on ____.

1. the relation of underweight babies to obese adults
2. the link between underweight babies and adults with heart disease
3. the relationship between underweight babies and underweight adults
4. underweight babies in connection with underweight mothers during pregnancy

(Reference keys.)