Question

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 4.6m above the river, an important feature 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 (顯著的) 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(原始的) 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.

1.What is the text mainly about?

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.

2.Young hoatzins are different from their parents in that_________ ．

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

3.What can we infer about primitive birds from the text?

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.

4.Why do hoatzins collect together in smaller groups when the rainy season comes?

A．To find more food. B．To protect themselves better.

C．To keep themselves warm. D．To produce their young.

 

Answer 1

1.D

2.B

3.A

4.D

【解析】

試題分析: 本文主要介紹了生活在亞馬遜和奧里諾科河河岸的小鳥hoatzins，它們的外貌很漂亮，幼鳥和成熟的鳥的生活習(xí)性不同以及它們的繁殖習(xí)性。

1.主旨大意題，根據(jù)第二段提到In appearance, the birds of both sexes look very much alike with brown on the back and cream and red on the underside. Baby hoatzins have a claw on the leading edge of each wing and another at the end of each wing tip.可知文章講的是hoatzins的外表和生活習(xí)性，故選D項。

2. 細(xì)節(jié)理解題。根據(jù)第一段has claws(爪)on its wings when young,和第三段可知，hoatzin在幼年期是有爪子的，而長大學(xué)會飛之后就沒有了，故選B項。

3. 細(xì)節(jié)理解題。根據(jù)第三段提到Using these four claws, together with the beak (喙), they can climb about in the bushes, looking very much like primitive(原始的) birds must have done.可知選A項。

4. 細(xì)節(jié)理解題。根據(jù)最后一段提到but in April, when the rainy season begins, they collect together in smaller living units of two to seven birds for producing purposes.在四月，雨季來臨時，他們會聚集在一起為了生產(chǎn)的目的，故選D項

考點：科普類閱讀。