Read the article and select the best answer. Article: Jeri Solomon is a morning person but Jim, her husband of 11 years, is not. Early in their life, it caused a problem. "When we were planning our wedding, I wanted to have these big discussions at 8 a. m.,when I had been up for two hours and was fresh, but Jim would just be getting out of bed," says the 46-year-old designer from Melrose, Mass. "We ended up getting into many arguments because I thought he had no interest, when really he was just still half-asleep." The couple learned to work around their differences over the years, but their situation isn't uncommon, says Katherine Sharkey, professor at BrownUniversity. "More women tend to be larks, while men are like night owls ," she says. The question is:Why? The answer lies in each person's body clock. "The body clock is about 24 hours, thanks to Earth's 24-hour light-dark cycle," Sharkey says. "But some people have a longer natural cycle, and some are shorter." If yours is on the long side, you're more likely to be a night owl. If it runs short, you're probably an early riser. But your body clock can change over your lifetime. There's a developmental piece-school-age children are generally early birds, while teenagers tend to be night owls, and then as they age, adults gradually turn back into morning people," Sharkey says. Besides the clear problems with being a night owl if you have fl day job, "night owls tend to be more low-spirited, and have a higher dependence on coffee," Sharkey says. But the news isn't all bad. A recent study in Belgium found that night owls can stay more focused as the day goes on, compared with early risers. Morning people, however, also have advantages. "Larks generally sleep better, have more regular sleep, and have more flexible characters," Sharkey says. They also tend to be happier and feel healthier than night owls, according to a recent study from the University of Toronto. Question: What is the purpose of the text? Options: A: To explain why we get up early or late. B: To advise every one of us to get up early. C: To tell us how to change our body clock. D: To point out morning people's advantages.
A

Read the article and select the best answer. Article: Box jellyfish are the most poisonous marine animals known to man. They measure 3 meters long and weigh up to 2 kilograms. They are pale blue and transparent in color, and get their name from the cube--like shape of their body, Box jellyfish have 6 eyes on all 4 sides of their body, although it is uncertain how they process what they see as they do not have a central nervous system. They also have up to 15 tentacles growing from each corner of their body that have about 5,000 stinging cells each. Box jellyfish can be found primarily in the coastal waters off Northern Australia as well as throughout the Indo--Pacific. They prefer to live at river mouths. They do not have any organs to breathe, and will sleep on the ocean floor from 3 pm to dawn. Unlike other jellyfish that merely move along with the current, box jellyfish have developed a way to travel wherever they want to go. _ will shoot themselves in a jet-like fashion, reaching speeds of up to 7.4 kilometers per hour. The diet of box jellyfish consists of thing like fish, small animals, and even other jellyfish. They use their venom, a chemical which causes heart, skin, and breath failure, to kill their prey . Since box jellyfish have eyes, some scientists believe that they actively hunt their prey while others insist that they are just passive opportunists that will wait and catch anything that wanders into their tentacles. Box jellyfish are responsible for more human deaths in Australia than snakes, sharks, and salt-water crocodiles combined. It is best to avoid them as most stings will result in death. Hopefully, humans and box jellyfish can find a way to live with one another while keeping conflicts to a bare minimum. After all, such a unique species of jellyfish deserves to live and grow just as humans do. Question: The text is mainly about _ . Options: A: a kind of sea animal B: some poisonous animals C: scientists' research into box jellyfish D: the relationship between humans and jellyfish
A

Read the article and select the best answer. Article: Hank Viscardi was 26 years old when he put on his first pair of long trousers and his first pair of shoes. For the first time he saw himself as he had always wanted to be a full five feet eight inches tall. Hank had been born without legs. Until he was seven, his world was a world of repeated operations. At last he had not legs, but stumps that could be fitted with a kind of special boots. Out of the hospital, Hank often found people staring at him with cruel interest. Children laughed at him and called him "Ape Man" because his arms dragged on the ground. He went to school like other boys. His grades were good and he needed only eight years instead of the usual twelve. After graduation, Hank worked his way through college. He swept floors, waited on table, or worked in one of the college offices. During all this busy life, Hank had been moving around on his stumps. But one day the doctor told him even the stumps were not going to last much longer. Hank would soon have to use a wheel chair. Hank felt himself go cold all over. However, the doctor said there was a chance that he could be fitted with artificial legs. Finally a leg maker was found and the day came when Hank stood up before the mirror and saw himself for the first time, five feet eight inches tall. But this was not the end yet. He had to learn to use his new legs. Again and again he marched the length of the room, and marched back again. There were times when he fell down on the floor, but he pulled himself up and went back to the endless marching. He went out on the street. He climbed the stairs and learned to dance. He built a boat and learned to sail it. When World War II came, he talked the Red Cross into giving him a job. He took the regular training. He marched and drilled along with the other soldiers. Few knew that he was legless. This was the true story of Hank Viscardi, the man without legs. Question: Children laughed at Hank and called him "Ape Man" because _ . Options: A: he didn't talk to them B: he kept away from them C: when he moved his arms touched the ground D: his arms were too long
C