Question

11．Almost all animals need to sleep to stay healthy．But sleeping can also be dangerous because other animals may hurt those who are sleeping．This leads to many different ways of sleeping that help them stay safe．Some of these ways may surprise you!
     Almost all bats sleep upside down．They hang from a branch of a tree or the ceiling of a cave．Up high，bats are safe from most other animals．If they are in danger，they just fly away．
     A dolphin sleeps with just half its brain at a time．It must stay awake to breathe and to watch for danger．Dolphin mothers and babies can go without sleep for as long as two months to stay safe．
     Some ducks sleep with just half their brains，too．These ducks often sleep in a line．The ducks at both ends help to keep the group safe．They keep one eye open to watch for danger．The ducks in the middle sleep deeply with both eyes closed．
     Seals breathe air，but that doesn't stop some of them from sleeping underwater．They hold their breath and dive deep to sleep for up to twenty minutes at a time．Sleeping deep underwater helps these seals stay safe from animals that hurt them near the surface．
     Horses often sleep standing up．Their legs lock in please so they don't fall over．If a horse is lying down，it needs a long time to get up．A horse can run from danger more quickly if it is already standing．
      A flamingo can sleep while standing on one leg．The standing leg locks so it stays straight．The other leg remains close to the flamingo's body．Its head rests on its back．A flamingo lives （and sleeps）near many other birds to stay safe．
     Some seabirds can sleep while they fly．These large birds spend most of their lives over the ocean．They are in danger on the water，but they are safe in the air．They fly for many hours without flapping（拍打）their wings．Sometimes they sleep while they are flying．
 38．The animals that sleep with half their brains areB
A．ducks and seals           
B．dolphins and ducks
C．bats and dolphins          
D．flamingos and seabirds
39．Horses often stand up when they sleep becauseA
A．they can run from danger quickly    
B．they are afraid of falling over
C．this helps them to sleep deeply      
D．it takes them a long time to go to sleep
40．The underlined word"hunt"in Paragraph 5 probably meansD
A．offer to help  
B．come to teach  
C．refuse to protect   
D．want to kill
41．Which of the following can be the best title for the passage？A
A．How animals sleep         
B．Sleep to stay healthy
C．Sleep an animals do        
D．What sleeping animals are like．

Answer 1

分析 短文講了動物需要睡眠來保持健康，但睡眠可能是危險的，因為其它動物可能會傷害那些正在睡覺的動物，短文詳細的介紹了一些動物的睡眠方式，通過這個方式來保護自己的安全．

解答 答案：38．B  細節(jié)理解題．根據(jù)第三段第一句A dolphin sleeps with just half its brain at a time．海豚一次只用半個大腦睡覺．和第四段第一句Some ducks sleep with just half their brains，too．一些鴨子也只有一半的大腦睡眠．可知海豚和鴨子只用一半的大腦睡覺．故選B．
39．A 細節(jié)理解題．根據(jù)第六段句子A horse can run from danger more quickly if it is already standing．馬站立睡眠是為了能更快的逃離危險，可知馬站立睡眠是為了能更快的逃離危險，故選A．
40．D 詞義猜測題．根據(jù)上下文Sleeping deep underwater helps these seals stay safe from animals that hunt them near the surface．睡在深水下能幫助海豹保持安全遠離那些在水面…的動物．可知結(jié)合選項，應(yīng)說睡在深水下能幫助海豹保持安全遠離那些在水面捕獵的動物．所以hunt意為捕獵，故選D．
41．A  主旨歸納題．根據(jù)整篇文章內(nèi)容及其第一段句子Almost all animals need to sleep to stay healthy．But sleeping can also be dangerous because other animals may hurt those who are sleeping．This leads to many different ways of sleeping that help them stay safe．Some of these ways may surprise you!幾乎所有的動物都需要睡眠來保持健康，但睡眠也可能是危險的，因為其它動物可能會傷害那些正在睡覺的動物，這會導(dǎo)致許多不同的睡眠方式，幫助它們保持安全！可知文章主要說的是動物如何睡覺．故選A．

點評 在通讀全文的基礎(chǔ)上，根據(jù)全文大意，展開邏輯思維，瞻前顧后，認真觀察選項，仔細推敲，確定最佳答案．