There are warm tropical regions all over the globe, but only the Indians of the South Ame

There are warm tropical regions all over the globe, but only the Indians of the South American rain forests have formed the habit of sleeping in the open air. Long before they made painful acquaintance (相识) with Europeans, they had invented something that was unique on earth: the hammock.
Nobody really knows who first had the bright idea of making sleeping in the air the symbol of untroubled rest. The Indians see the hammock as a “gift of heaven (上天)”, something given to them a very long time ago.
In it the Indians pass away hot noon hours, napping or chatting. Swinging it to and fro (来回摆动) creates a cooling breath of air and keeps away insects. They work and play in hammocks, are born and die there.
Hung like a suspension bridge between heaven and earth, a hammock is dry while the soil is damp and is safe from most wild animals.
Hammocks have the advantage over beds in that they are easy to transport and take up very little space when they have been rolled up(卷起) . Indians never go on a journey without their hammocks, not even to their plantations.
76.The word hammock in this passage means .
A. a suspension cage which can be swung to and fro in the air
B. a seat hanging by two ropes from the branch of a tree
C. a suspension bridge in the South American rain forests.
D. a net hung between two supports and used as a bed.
77. When was the hammock invented and by whom?
A. The Indians had invented the hammock long before they came to South America.
B. The Indians had invented the hammock long before the Europeans came to South America.
C. The Europeans invented the hammock after they made acquaintance with the Indians.
D. The Europeans had invented the hammock before they went to South America.
78. Indians swing the hammock to .
A. pray to heaven for a gift B. keep away flies, mosquitoes and other insects
C. keep away wild animals D. all asleep quickly
79. According to the passage, hammocks .
A. cannot be rolled up B. are difficult to transport
C. are never brought to the plantations D. can be kept dry while the ground is wet
80. The passage is about .
A. the Indian way of living B. tropical regions
C. Indians' gift for the Europeans D. a portable bed76---80 DBBDD

(答案→)76---80 DBBDD 解析：76.这是一道归纳题。可以从文中第三、四、五段中找出hammock的特点。故答案为D。77.这是一道细节题。第一段中最后一句话Long before they made painful acquaintance (相识) with Europeans, they had invented something that was unique on earth: the hammock.可知选项B是最佳答案。78.这是一道细节题。第三段中：Swinging it to and fro (来回摆动) creates a cooling breath of air and keeps away insects. 点明了该题的答案。79.这是一道细节题。最后一段的意思排除了选项A、B、C。只有选项D是正确答案。80.这是一道主旨题。这篇文章主要讲述了印地安人的Hammock的故事。讲了它的用处及好处。

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