61. Leading scientists advocate vegetarian diet mainly to ____.

1. protect the environment
2. solve the food crisis
3. save animals
4. preserve farmland

62. "A red herring" (Line 6, Para. 3) might refer to something that ____.

1. averts your attention from the main subject
2. wins enthusiastic support from the public
3. is true but not widely accepted
4. seems convincing but is hard to prove

63. According to the author, the prime cause of food shortage is ____.

1. sharp increase in world population
2. inadequate food production
3. unbalanced wealth distribution
4. irrational utilization of cropland resources

64. The author opposes a universal vegetarianism in that ____.

1. it is unaffordable for the poor
2. it is detrimental to our health
3. it violates the custom of certain areas
4. it exerts great pressure on food supply chains

65. The author suggests that the discussion about food security should stress ____.

1. promoting a healthy and humane lifestyle
2. reducing the consumption of animal products
3. advancing the globalization of economy
4. redefining our priorities and pursuing goals

(Reference keys.)