If fermented fruit on the ground is out of the question, so is the notion that the fruit could ferment in the stomach of elephants, according to the study authors. Food takes between 12 and 46 hours to pass through an elephant’s digestive system, the authors point out, which is not enough for the fruit to ferment.
Supposing that this happened, it’s still highly improbable that the food would produce enough alcohol to make an elephant drunk. Through calculations of body weight, elephant digestion rates, and other factors, the authors conclude that it would take about 1.9 litres of ethanol(乙醇) to make an elephant drunk.
56. We can learn from the passage that ________.
A. it is not easy to find marula fruit in the wild in Africa
B. African elephants don’t like to eat marula fruit at all
C. marula fruit can be made into food or drink consumed by people
D. birds and monkeys in Africa like to eat rotten marula fruit
57. According to Paragraph 6, marula fruit is likely to ferment ________.
A. in about 12 hours
B. in about 34 hours
C. between 12 and 46 hours
D. in more than 46 hours
58. According to Mr. Morris, which of the following is TRUE?
A. Elephants just eat the fruit right off the tree.
B. Elephants will not eat the fruit which is rotten.
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