61. The Japanese study was carried out on ____.

1. the development of IQ
2. the secret of longevity
3. the brain food in a glass
4. the amount of healthy drinking

62. The Japanese researchers found a higher IQ in ____.

1. female teetotalers than in male ones
2. female drinkers than in male ones
3. moderate drinkers
4. teetotalers

63. When he says that it is very difficult to show cause-effect relationship, Shimokata means that ____.

1. the study failed to involve such variables as income and education
2. he is doubtful of the findings of the investigation
3. there are some other contributing factors
4. the results were just misleading

64. From Shimokata's mention of fish and cheese we can infer that in enhancing intelligence ____.

1. sake or wine is a perfect match for fish and cheese
2. they promote the drinking effect of sake or wine
3. they are not as effective as sake and wine
4. sake or wine is not alone

65. Based on the study, Shimokata would say that ____.

1. intelligence improves with age
2. IQ can be enhanced in one way or another
3. polyphenols in alcohol may boost the brain
4. alcoholic drinks will make you more intelligent

(Reference keys.)