Question

阅读理解 　　Millions of years ago dinosaurs(恐龙)lived on the earth．In the days of dinosaurs the whole earth was warm and wet．There were green forests and they could find enough to eat．Later, parts of the earth became cold and dry, and the forests there died．Then dinosaurs could not find enough to cat．This must be one reason why dinosaurs died out． 　　We can guess another reason．New kinds of animals came on the earth．Some had big brains and were fast and strong．They could kill dinosaurs．There may be other reasons that we don’t know about yet．Scientists are trying to make more discoveries about dinosaurs． 　　Dinosaurs were of many sizes and shapes(形状)．Some were as small as chickens, while some were about 90 feet long． 　　There were also terrible fights between dinosaurs．They might have happened more than 100 million years ago．Though there was no man to see any of the fights, we can be told by the animal’s footprints(足迹)that fight did take place． (1) According to the passage, dinosaurs did exist only _______ on the earth． [　　] A． for millions of years B． millions of years ago C． more than 100 millions years ago D． when it was warm and wet somewhere (2) One reason why dinosaurs died out is that _______． [　　] A． there were too many dinosaurs B． parts of the earth became cold and dry C． the dead forests there could not supply them with enough food D． they couldn’t find enough to eat (3) One more reason may be that _______． [　　] A． new kinds of animals came on the earth B． some fast and strong animals with big brains could kill them C． some dinosaurs were as small as chickens D． some big dinosaurs died in the fights (4) We can see from this passage _______． [　　] A． scientists are trying to make some dinosaurs B． dinosaurs are dangerous enough C． dinosaurs are worth studying D． scientists know nothing about dinosaurs (5) That terrible fights can be explained by _______． [　　] A． footprints of the animals B． imagination(想象) C． rocks and forests D． dinosaurs eggs

Answer 1

答案：1．B;2．D;3．B;4．C;5．A;
解析：

(1)	细节题。本题的依据是第一段的第一句“Millions of years ago dinosaurs(恐龙)lived on the earth”可知答案为B项。
(2)	推断题。通过对第一段中“Later，parts of the earth became cold and dry, and the forests there died．Then dinosaurs could not find enough to eat．This must be one reason why dinosaurs died out．”的理解可知，恐龙灭亡的原因是因为没有足够的食物吃，所以答案选D项。
(3)	细节题。本题的依据是第二段的三、四两句“Some had big brains and were fast and strong．They could kill dinosaurs”可知答案选B项。
(4)	推理题。本题依据文中第二段的后两句“There may be other reasons that we don’t know about yet．Scientists are trying to make more discoveries about dinosaurs．”来推测，人们还不完全了解恐龙，有进一步研究的必要。
(5)	句意理解题。通过对文章最后一段的最后一句的理解，可选出该题答案。