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 本篇文章是說明文．講的是一種生活在亞馬遜和奧里諾科河比較罕見的鳥類動(dòng)物麝雉的外貌和生活習(xí)性．沿著河岸亞馬遜和奧里諾科河住著一只鳥，它是先會(huì)游才會(huì)飛，飛時(shí)如一個(gè)胖胖的雞，它吃綠葉，它年輕時(shí)有一個(gè)牛似的胃，翅膀上有爪子，他們窩巢建在河上約4.6米，相對(duì)來說對(duì)幼崽比較安全．從外表上來說，這種鳥的雄雌鳥長(zhǎng)得很像，都是棕色后背和淺黃色紅色相間的腹部、頭部都很小，頂部有一組巨大羽毛簇，明亮的紅色眼睛和藍(lán)色的皮膚，他們的近親就是普通的杜鵑鳥，他們的顯著特性只存在于幼鳥時(shí)期．

解答 DBAD
25．D    主旨大意題．從全文來看介紹了麝雉的外表和他們的生活棲息地． 故選D項(xiàng)．
26．B     推理判斷題．文章的第三段"When the young hoatzins have learned to fly，they lose their claws"可知，小時(shí)候麝雉的和成人的麝雉的區(qū)別是年輕時(shí)翅膀上有爪子．故選的是B項(xiàng)．
27．A    推理判斷題．根據(jù)文章倒數(shù)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，的所講的"可知，遠(yuǎn)古的鳥可以利用他們的四個(gè)爪子和喙攀爬，故選A項(xiàng)．
28   D    細(xì)節(jié)理解題．根據(jù)文章的最后一句"they collect together in smaller living units of two to seven birds for producing purposes"可知，在雨季來臨的時(shí)候他們聚集在一個(gè)小窩是為了保護(hù)小麝雉．故選D項(xiàng)．

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