题目内容

die off/die for/die out/die from/die of

(1)The practice of children working in factories has nearly _________.?

(2)They had to watch their young family_________ through lack of food.?

(3)Each year quite a lot of people __________ car accidents.?

(4)Some rare animals,giant panda,for example are now in danger of______ .?

(5)He would rather ________ his motherland than give in.?

(6)She was ________ a drink.?

(7)The wind had _________ by dusk.?

(8)The noise had ___________.?

答案:
解析:

(1)died out (2)die off (3)die from (4)dying out (5)die for ?(6)dyingfor (7)died away (8)died down


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In the eyes of dog lovers, the dog is man’s best friend. But for much wildlife, loose dogs may be a dangerous enemy, according to a study by a biologist from Utah State University in the US.

Based on much existing research and their own case studies, Julie Smith of Utah State University and four other scientists conclude that loose dogs may represent a huge danger to wildlife, especially endangered species, by hunting down or worrying them and by spreading diseases. They also found that dogs, their worldwide numbers around 500 million, can cause more damage to wildlife and livestock(牲畜) than wolves and other enemies of these animals.

Smith gave examples from the US state of Idaho, where research showed the presence of dogs reducing some deer populations. On the Navajo American Indians’ reservation in northeastern Arizona, packs of loose dogs are attacking livestock. They have killed populations of small animals such as rabbits and act as a disease carrier for rabies(狂犬病) among people and other animals, she said. Loose dogs also were to blame for distemper(温热病) outbreak leading to a die-off of endangered black-footed ferrets in northwestern Wyoming in the 1980s.

The phenomenon is not just limited to US; it’s a global problem. Julie Smith once studied three endangered species in central Asia: wild sheep, gazelles and antelope. The rate of injury and death to these animals by loose dogs was very high. In another case, Smith found that dogs, not wolves, as originally suspected, were responsible for a large number of livestock killings in the mountainous Basque country between Spain and France.

Authors of the new study said the problem is likely to worsen as communities expand. Then how to deal with it?

Indeed, in many countries, leash(拴狗的皮带) laws permit punishment of dog owners whose pets attack wildlife. But lawbreakers are rarely punished because the police lack both people and money.

Smith has low-cost solutions to the problem for dog lovers, though. They include public dog-training programs and vaccinating (预防接种) dogs against rabies and other illnesses.

1.Julie Smith’s study mainly tells us that _______.

A.many species are endangered because they are killed by loose dogs.

B.wild dogs are immune to many diseases.

C.wolves are still the greatest enemy of livestock.

D.loose dogs are a great danger to wildlife.

2.Which of the following statements about loose dogs is TRUE according to the research?

A.There are around 500 million loose dogs around the world.

B.The black-footed ferrets in northwestern Wyoming were once the main food source of local loose dogs.

C.The problem caused by loose dogs is the most serious in the US.

D.People used to think that wolves, rather than loose dogs killed livestock in the Basque country.

3.Which of the following is among Julie Smith’s solutions to the trouble caused by loose dogs?

A.More strict leash laws

B.Public dog-training programs.

C.Vaccinating people against rabies and other illnesses.

D.More support from the police.

4.What is the main point of the article?

A.A global disaster caused by loose dogs.

B.What makes the dog man’s greatest friend.

C.The problem of loose dogs and the possible solutions.

D.The danger of the increasing numbers of dogs.

 

If you want to stay young, sit down and have a good think. This is the research finding of a team of Japanese doctors, who say that most of out brains are not getting enough exercise, and as a result, we are growing old unnecessarily soon.

Professor Taiju Matsuzawa wanted to find out why quite healthy farmers in northern Japan appeared to be losing their ability to think and reason at a rather early age, and how the speed of getting old could be slowed down.

With a team of researchers at Tokyo National University, he set about measuring brain sizes of a thousand people of different ages with different jobs.

Computer technology helped the researchers to get most exact measurements of the sizes of the front and side parts of the brain, which have something to do with thinking and feeling, and decide the human character. As we all know, the back part of the brain, which controls task like eating and breathing, does not contract(萎缩) with age.

Contraction of front and side parts, as cells(细胞) die off, was seen in some people in their thirties, but it was still not found in some sixty and seventy-year-olds.

Matsuzawa concluded from his tests that there is a simple way to prevent the contraction---using the head.

The findings show that contraction of the brain begins sooner in people in the country than those in the towns. Those with least possibility, says Matsuzawa, are lawyers, followed by university professors and doctors. White-collar workers doing the same work day after day in government offices are, however, as possible to have contracting brains as the farm workers, bus drivers and shop assistants.

1. The team of doctors wanted to find out ____.

   A. at what point people grow live longer. 

B. how to make people live longer

   C. the size of certain people’s brains.  

D. which group of people are the busiest

2.Their research findings are based on ______.c

   A. an examination of farmers in northern Japan 

B. using computer technology

   C. examining the brain sizes of different people 

D. tests given a thousand old people

3.The doctor’s tests show that ______.

   A. our brains contract as we grow older  

B. one part of the brain does not contract

   C. sixty-year-olds have better brains than thirty-year-olds

   D. contraction of the brain begins sooner in people in the country

4. According to the article, _____ are growing mentally old earlier.

   A. engineers    B. office clerks    C. professors    D. researchers

5.The most possible conclusion of the article is that ____.

   A. most of us should take more exercise  

B. it’s better to live in the towns

   C. the brain contracts if it is not used 

D. the more one uses his brain, the sooner he becomes old

 

 

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