Squirrels often communicate with whistles, chirps and chucks, which sound like the word "chuck". Whistles and chirps are like the sounds that many birds make.Now scientists have translated some of their squirrel-speak. Hare, a professor of zoology at the University of Maniloha in Winnipeg, and his team managed to record squirrels' alarm calls.The researchers studied the sounds and then played them back to 60 wild squirrels, which the scientists approached individually with a video recorder to capture their reponses.Some squirrels lifted their heads up and became.Alert .Creatures that were more frightened simply ran for their lives and dived into caves. "In effect then, whistles that mix with chucks say 'there's an enemy of average threat that's here', and whistles without chucks say 'there's an enemy of seemingly average threat around here somewhere', while pure chirps say, 'I'm hiding here because there's an immediate danger.' " Hare told.Discovery News. Hare and some other researchers believe such sounds arc part of an advanced language that develops just as all other communication systems. Although squirrels risk their lives when they call out to warn others of threats, other squirrels might admire this behaviour, thus increasingly the caller's social status, like humans who look up to heroes. Hare added that other animals, such as birds, probably understand at least some squirrel language, since they also may benefit from the alarm calls. In fact, another Canadian study found that deep-voiced, black-capped chickadees have their own language too.According to certain research, there are a lot of tidings in chickadees' calls, such as directing fellows' activities, keeping in contact between mates, and raising alarms. While chickadees and other birds are often welcomed into gardens by homeowners, squirrels are frequently viewed as pests . Hare wishes a greater understanding of the complex social lives and communication systems of squirrels will provide "hope that humans will gain a greater appreciation and... If a squirrel is in a very dangerous situation, it would probably make _ . A) whistles with chucks B) pure chirps C) whistles without chucks D) repeated chucks
B
(Question)
You heard about the sign posted on a farm fence? Inside there was a big and mean bull. The sign read, "Don't attempt to cross this field unless you can do it in 9.9 seconds. The bull can do it in 10!" Don't try to cross that field unless you are prepared! And isn't that the way it is in life? We have to be ready when the opportunity arises or else we will have little chance of success. Sixth-grade teacher Ms. Shelton believed in readiness. When she walked into the classroom on the first day and began writing words of an eighth-grade level on the blackboard, the students immediately said that the words were not at their level and they couldn't learn them. Their teacher insisted that they could and would learn these words. She said that she would never teach down to them. Ms. Shelton ended by saying that one of the students in the classroom could go on to greatness, maybe even be president someday, and she wanted them to prepare for that day. Ms. Shelton said those words many years ago. Little did she know that someday one of her students--Jesse Jackson--would take them seriously. She believed that if they were well prepared, they could achieve high goals. Ralph Waldo Emerson once said, "People only see what they are prepared to see." If that's true, then it is also true that they only become what they are prepared to become. And a lot of life is just about getting ready. Think of today as a chance to prepare yourself for the exciting future you are looking for. Today is not wasted. If you desire more from life, you can use today as training. For you will experience only what you are prepared to experience. Something wonderful can happen. And you can use today to get ready for tomorrow. What can be the best title of the passage? A) Get Ready for Tomorrow B) Don't Waste Time C) Challenge Yourself D) Ms. Shelton, a Famous Teacher
(Answer)
A
Question: A thief entered the bedroom of the 30th President of the United States, who met him and helped him escape punishment. The event happened in the early morning hours in one of the first days when Calvin Coolidge came into power, late in August, 1923.He and his family were living in the same third-floor suite at the Willard Hotel in Washington that they had occupied several years before.The former President's wife was still living in the White House. Coolidge awoke to see a stranger go through his clothes, remove a wallet and a watch chain. Coolidge spoke, "I wish you wouldn't take that." The thief, gaining his voice, said, "Why?" "I don't mean the watch and chain, only the charm .Take it near the window and read what is impressed on its back, " the President said. The thief read, "Presented to Calvin Coolidge." "Are you President Coolidge ? " he asked. The President answered, "Yes, and the House of Representatives gave me that watch charm.I'm fond of it.It would do you no good.You want money.Let's talk this over." Holding up the wallet, the young man said in a low voice, "I'll take this and leave everything else." Coolidge, knowing there was $80 in it, persuaded the young man to sit down and talk.He told the President he and his college roommate had overspent during their holiday and did not have enough money to pay their hotel bill. Coolidge added up the roommate and two rail tickets back to the college.Then he counted out $32 said it was a loan . He then told the young man, "There is a guard in the corridor." The young man nodded and left through the same window as he had entered. Coolidge counted out $32 _ . A) in order not to be killed by the thief B) in order to be out of danger C) so as to help the young student overcome his difficulty D) because he had no more money
Answer:
C