Howling is a behaviour commonly observed among a wolf pack. As pack animals, wolves work together to hunt and rely on howling as an important means of communication among each other. There are different explanations of a wolf’s howl and it appears that there may be more to discover.
One theory is that wolves howl to bond better together. It’s almost as if howling together helps the pack stay together. Perhaps something similar to people feeling a sense of involvement with each other when singing a song together. But this theory may be wrong, explains Fred H. Harrington, a professor who studies wolf behaviour.
Indeed, there have been times when wolves have been seen one moment howling in a chorus, and the next, quarreling among each other. It appears that usually the lowest-ranking members of the pack may actually be “punished” for joining in the chorus at times. So is howling a way to strengthen a social bond or just a way to reconfirm status a
mong its members? —Why do wolves howl for sure?
What is clear, however, is that howling is often used among packmates to locate each other. Hunting grounds are distant and it happens that wolves may separate from one another at times. When this happens, howling appears to be an excellent means of gathering.
Howling, interestingly, is a contagious behaviour. When one wolf starts to howl, very likely others will follow. This is often seen to occur in the morning, as if wolves were doing some sort of “roll call” where wolves all howl together to report their presence.What is the possible similarity between wolves’ howling together and humans’ singing in chorus?
| A．The act of calling each other. | B．The sense of accomplishment. |
| C．The act of hunting for something. | D．The sense of belonging to a group. |
Why does Harrington think the “social bond” theory may be wrong?
| A．Wolves separate from each other after howling. |
B．Wolves tend to protect their huntin g grounds. |
| C．Wolves sometimes have quarrels after howling together. |
| D．Wolves of low rank are encouraged to join in the chorus. |
Researchers are sure that wolves often howl to ______.
| A．show their ranks | B．find their companions |
| C．report the missing ones | D．express their loneliness |
“Howling… is a contagious behaviour” (in the last paragraph) means _______.
| A．howling is a signal for hunting |
| B．howling is a way of communication |
| C．howling often occurs in the morning |
| D．howling spreads from one to another |
Much later that night, the question of why I'd stopped for that light came back to me. I think I stopped because it's part of a contract(契约)we all have with each other. It's not only the law, but it's an agreement we have, and we trust each other to honor it: we don't go through red lights.
Trust is our first inclination(倾向)．Doubting others does not seem to be natural to us. The whole construction of our society depends on mutual(相互)trust, not distrust. We do what we say we'll do; we show up when we say we'll show up; and we pay when we say we'll pay. We trust each other in these matters, and we're angry or disappointed with the person or organization that breaks the trust we have in them.The event made the author strongly believe that________.
| A．traffic rules may be unnecessary |
| B．doubting others is human nature |
| C．patience is important to drivers |
| D．a society needs mutual trust |
If left alone outside, dogs and cats can be very smart in their search for warm shelter. They can dig into snow banks or hide somewhere. Watch them closely when they are left outdoors, and provide them with shelter of good quality. Keep an eye on your pet's water. Sometimes owners don't realize that a water bowl has frozen and their pet can't get anything to drink. Animals that don't have clean and unfrozen water may drink dirty water outside, which may contain something unhealthy for them....If pets are left on their own outdoors in cold weather, they may ________.
| A．run short of clean water |
| B．dig deep holes for fun |
| C．dirty the snow nearby |
| D．get lost in the wild |
For her first garden, Ms. Feeley has put in 15 tomato plants, and five rows of a variety of vegetables. The family's old farm house has become a chicken house, its residents arriving next month....What does the word“residents” in Paragraph 1 probably refer to?
| A．chickens | B．tomatoes |
| C．gardens | D．people |
A fixed mindset is grounded in the belief that talent (才能) is genetic—you're a born artist, point guard or numbers person. The fixed mindset believes it's sure to succeed without much effort and regards failure as personal shame. When things get difficult, it's quick to blame, lie, and even stay away from future difficulties.A fixed mindset person is probably one who _____.
| A．doesn't want to work hard |
| B．cares a lot about personal safety |
| C．cannot share his ideas with others |
| D．can succeed with the help of teachers |
Yet some people wonder if the revolution in travel has gone too far. A price has been paid, they say, for the conquest (征服) of time and distance. Travel_is_something_to_be_
enjoyed,_not_endured(忍受). The boat offers leisure and time enough to appreciate the everchanging sights and sounds of a journey. A journey by train also has a special charm about it. Lakes and forests and wild, open plains sweeping past your carriage window create a grand view in which time and distance mean nothing. On board a plane, however, there is just the blank blue of the sky filling the narrow windows of the airplane. The soft lighting, inflight films and gentle music make up the only world you know, and the hours progress slowly.How does the writer support the underlined statement in Paragraph 2?
| A．By giving instructions. |
| B．By analyzing cause and effect. |
| C．By following the order of time. |
| D．By giving examples. |