Question

9．Along the river banks of the Amazon and the Orinoco there lives a bird that swims before it can fly，flies like a fat chicken，eats green leaves，has the stomach of a cow and has claws （爪） on its wings when young．They build their homes about 4.6 m above the river，an important feature （特征） for the safety of the young．It is called the hoatzin．
In appearance，the birds of both sexes look very much alike with brown on the back and cream and red on the underside．The head is small，with a large set of feathers on the top，bright red eyes，and blue skin．Its nearest relatives are the common birds，cuckoos．Its most striking feature，though，is only found in the young．
Baby hoatzins have a claw on the leading edge of each wing and another at the end of each wing tip．Using these four claws，together with the beak （喙），they can climb about in the bushes，looking very much like primitive birds must have done．When the young hoatzins have learned to fly，they lose their claws．
During the drier months between December and March hoatzins fly about the forest in groups of 20 to 30 birds，but in April，when the rainy season begins，they collect together in smaller living units of two to seven birds for producing purposes．
25．What is the text mainly about？D
A．Hoatzins in dry and rainy seasons．
B．The relatives and enemies of hoatzins．
C．Primitive birds and hoatzins of the Amazon．
D．The appearance and living habits of hoatzins．
26．Young hoatzins are different from their parents in thatB．
A．they look like young cuckoos
B．they have claws on the wings
C．they eat a lot like a cow
D．they live on river banks
27．What can we infer about primitive birds from the text？A
A．They had claws to help them climb．
B．They could fly long distances．
C．They had four wings like hoatzins．
D．They had a head with long feathers on the top．
28．Why do hoatzins collect together in smaller groups when the rainy season comes？D
A．To find more food．
B．To protect themselves better．
C．To keep themselves warm．
D．To produce their young．

Answer 1

分析 本篇文章是说明文．讲的是一种生活在亚马逊和奥里诺科河比较罕见的鸟类动物麝雉的外貌和生活习性．沿着河岸亚马逊和奥里诺科河住着一只鸟，它是先会游才会飞，飞时如一个胖胖的鸡，它吃绿叶，它年轻时有一个牛似的胃，翅膀上有爪子，他们窝巢建在河上约4.6米，相对来说对幼崽比较安全．从外表上来说，这种鸟的雄雌鸟长得很像，都是棕色后背和浅黄色红色相间的腹部、头部都很小，顶部有一组巨大羽毛簇，明亮的红色眼睛和蓝色的皮肤，他们的近亲就是普通的杜鹃鸟，他们的显著特性只存在于幼鸟时期．

解答 DBAD
25．D    主旨大意题．从全文来看介绍了麝雉的外表和他们的生活栖息地． 故选D项．
26．B     推理判断题．文章的第三段"When the young hoatzins have learned to fly，they lose their claws"可知，小时候麝雉的和成人的麝雉的区别是年轻时翅膀上有爪子．故选的是B项．
27．A    推理判断题．根据文章倒数第二段"Baby hoatzins have a claw on the leading edge of each wing and another at the end of each wing tip．Using these four claws，together with the beak （喙），they can climb about in the bushes，的所讲的"可知，远古的鸟可以利用他们的四个爪子和喙攀爬，故选A项．
28   D    细节理解题．根据文章的最后一句"they collect together in smaller living units of two to seven birds for producing purposes"可知，在雨季来临的时候他们聚集在一个小窝是为了保护小麝雉．故选D项．

点评 学生需要认真阅读原文，把握文章大意，对文章脉络有整体的了解，能仔细查找文中细节，并能根据文章内容进行合理的推测判断．