题目内容
根据短文内容,从短文后的七个选项中选出能填放空白处的最佳选项。选项中有两项为多余选
项。
Why Cats Scratch Tings
In has long been assumed that when cats scratch objects with their front paws(爪子)that they are sharpening their claws. 1 Research on cat behavior suggests that the major reason for this behavior is communication. By scratching up the bark of a tree (or the leg of your favorite chair) the cat is letting other cats or people know where she is and what she is up to.
Cats tend to pick a small number of noticeable objects in their environments to scratch such as trees, fence posts repeatedly. 2 The scratched surface leaves a highly visible mark that can be easily seen by other cats. In addition, cats have special glands (腺)in their paws so that when they make scratching movements they leave scent(气味)that the cats can smell. The fact that cats leave scent marks by making scratching movements may be the reason that cats will continue to scratch objects even after they have been declawed. 3
We don’t know exactly what cats are communicating with their scratching. Both males and females do it. It is done inside and outside the home and even by cats living with no other cats around. 4 Cats don’t scratch up your furniture to bother you or just to be destructive, but for specific reasons, one of which is communicating. Cats also scratch to extend their bodies, during play, and possibly as a greeting or to relieve dissatisfaction when prevented from doing other things they want to do.
5 It is easier to prevent problem scratching rather than trying to change your cat’s preference for the arm of your sofa after it has become a built up habit. Thus, the goal is to establish acceptable scratching habits by getting your cat to prefer a scratching post rather than the arm of your sofa.
A.It turns out that this is only a secondary reason.
B.This is why the tree next door looks so scratched up.
C.Cats use other parts of their bodies to communicate as well.
D.Small pieces of bark have accumulated on the ground underneath.
E.Scratching can result in considerable damage, owner dissatisfaction.
F.Declawed cats may still be leaving scent marks on objects they scratch.
G.It could be a defensive warning or just a marker that announces its existence.
ABFGE
【解析】略
第二节(共5小题;每小题2分,满分10分)
根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
In 1990 a report was published about what the earth might be like 20 years from then on. 71 According to the report,the picture of the earth in the year 2010 is not a pleasant one. 72 The population could be as large as 6300 million,almost 2150 million more than in 1985.More people would move into cities ,especially cities in developing countries.Cities like Cairo and Jakarta probably would each have 15 million by then.
73 Farmers will grow 90% more food than they did in 1985,but most of the increase would be in countries that already produce enough food for their people. 74 Poor farming ways are destroying large areas of crop land,changing farms into deserts.More farmland is lost as cities become larger and more houses are built.Air pollution will get worse as industrial countries burn more coal and oil.Many of the world's forests could disappear as more and more trees are cut down.Energy will continue to be a serious problem. 75 They only workde out the situation that exists today.By changing the situation,by settling the problems,the picture can be changed.There is still time for the nations of the world to work out a plan of action.But they warned that waiting too long to make de cisions would greatly reduce the chances of success.
A.Food production will increase,but not enough to feed all the people. |
B.The report was a result of a three - year study. |
C.Later on,more reports came out one by one. |
D.The world will be more crowded because the population will continue to grow. |
E.Experts believe enough food will be produced in developing countries very soon.
F.The experts say their picture of the earth for the year 2010 may be wrong.
G.Little increase is expected in South Asia,Africa and the Middle East.