71. When they redesigned air bags to hold less pressure, the American car manufacturers ____.

1. found it hard to set standards without the definition of obesity
2. incidentally brought about extra risks to obese passengers
3. based their job on the information of car accidents
4. actually neglected smaller women and children

72. When they categorized the obese people, the researchers ____.

1. showed a preference for BMI in measurements
2. achieved almost the same results as previously
3. found the units of kilogram more applicable than BMI
4. were shocked to know the number of obese people killed in car crashes

73. To address the problem, Mock ____.

1. suggested that the safety authorities use heavier crash-test dummies
2. cried for the standardization of crash-test dummies
3. reduced the weights of crash-test dummies
4. encouraged obese people to lose weight

74. While exploring the reason for the higher injury and death rates, Mock would most probably say that ____.

1. cars can be made safer to avoid crashes
2. it is wise for obese people not to drive drunk
3. it is not just total weight, but obesity itself that is dangerous
4. the main reason behind the problem is drinkers' heavy weight

75. Which of the following questions is closely related to the passage?

1. Are air bags really necessary to be built in cars?
2. Are cars certified as safe to drive?
3. Are crash-test dummies too thin?
4. Are car accidents preventable?

(Reference keys.)