Read the following article and select the best answer. Article: The groundhog has been considered a weather prophet for many years in north America. According to legend, all winter long the furry brown groundhog sleeps in his comfortable underground home, or hole. On February 2, he wakes up. The groundhog is very hungry and comes out to search for food. If the sun is shinning, the groundhog will see his own shadow. The sight of his shadow gives him such a fright that he quickly returns to his hole. This event means that spring will not come for six more weeks. If the sun is not shining, there will be no shadow. The groundhog will not be scared and he will stay outside his hole. Spring will come very soon. The idea that animals could foretell the weather probably began in ancient Europe. At the time, most of the people were farmers and the weather was very important to them. If spring came early they could begin the planting season early and have an early harvest. They found some animals were good weather prophets. On February 2, when they celebrated Candlemas Day, a religious holiday around the time winter ends, all the people watched for an animal leaving its hole. In Germany, farmers watched for a badge. In England farmers looked for a hedgehog . They believed the animals could foretell the weather for the next six weeks. When the early settlers came to North America there no badgers or hedgehogs near their homes. The farmers did not know when to plant their crops. In time they discovered an animal that left its hole at the end of winter. That animal was the groundhog, also called a woodchuck or a marmot. Every February 2 they watched for a groundhog. Finally, the day came to be called "Groundhog Day". Many groundhog-watching clubs were formed. The members sometimes dressed in nightshirts and top hats made of silk. They would go to the hills in the dark morning and wait near a groundhog hole. Sometimes the groundhog-watching clubs would have other types of celebrations Question: The early North American settlers _ . - wore formal clothes on Groundhog Day - tried to catch groundhogs near their homes - regarded the groundhog as a weather prophet - mistook groundhogs for badgers or hedgehogs
regarded the groundhog as a weather prophet

(Question)
Read the following article and select the best answer. Article: A month went by in this manner , but a month was all I could bear . The memory of Marguerite accompanied me wherever I went . I had loved that woman --- still loved her --- too much for her suddenly to mean nothing to me . Whatever feelings I might have for her now , I had to see her again . At once . ... I knew Marguerite . Meeting me so unexpectedly must have thrown her into a state of great confusion . Probably , she had heard of my departure which had set her mind at rest as to the consequences of our sudden parting . But , seeing me back and coming face to face with me , pale as I was , she had sensed that my return had a purpose , and must have wondered what was going to happen . If , when I saw her again , Marguerite had been unhappy ; if , in taking my revenge , there had also been some way of helping her , then I might well have forgiven her , and would certainly never have dreamed of doing her any harm . But when I saw her again , she was happy , at least on the surface . Another man had ensured her the luxury in which I had been unable to keep her . She brought shame both to my pride and my love ; she was going to have to pay for what I had suffered . I could not remain indifferent to what she did now . It followed that the thing that would hurt her most would be exactly for me to show indifference . Indifference , therefore , was the feeling which I now needed to pretend , not only in her presence but in the eyes of others . I tried to put a smile on my face , and I went to call on Prudence with whom Marguerite was staying . Prudence saw me to the door , and I returned to my apartment with tears of anger in my eyes and thirst for revenge in my heart and thought only of finding a way to make the poor creature suffer . Question: According to the passage , the hero wanted to _ . - forgive Marguerite because he found her unhappy - stop the relationship with Marguerite because he couldn't keep her in the luxury - make up the relationship with Marguerite because he still loved her - give Marguerite sufferings because his pride and his love were hurt
(Answer)
give Marguerite sufferings because his pride and his love were hurt

Question: Read the following article and select the best answer. Article: Unlike chemists and physicists, who usually do their experiments using machines, biologists and medical researchers have to use living things like rats. But there are three Nobel prize-winning scientists who actually chose to experiment on themselves - all in the name of science, reported The Telegraph. 1. Werner Forssmann (Nobel prize winner in 1956) Forssmann was a German scientist. He studied how to put a pipe inside the heart to measure the pressure inside and decide whether a patient needs surgery. Experiments had been done on horses before, so he wanted to try with human patients. But it was not permitted because the experiment was considered too dangerous. Not giving up, Forssmann decided to experiment on himself. He anaesthetized his own arm and made a cut, putting the pipe 30 centimeters into his vein. He then climbed two floors to the X-ray room before pushing the pipe all the way into his heart. 2. Barry Marshall (Nobel prize winner in 2005) Most doctors in the mid-20th century believed that _ was down to stress, spicy food or an unusually large amount of stomach acid. But in 1979 an Australian scientist named Robin Warren found that the disease might be related to a bacteria called Helicobacter pylori. So he teamed up with his colleague, Barry Marshall, to continue the study. When their request to experiment on patients was denied, Marshall bravely drank some of the bacteria. Five days later, he lost his appetite and soon was vomiting each morning - he indeed had gastritis. 3. Ralph Steinman (Nobel prize winner in 2011) This Canadian scientist discovered a new type of immune system cell called the dendritic cell. He believed that it had the ability to fight against cancer. Steinman knew he couldn't yet use his method to treat patients. So in 2007, when doctors told him that he had cancer and that it was unlikely for him to live longer than a year, he saw an opportunity. With the help of his colleagues, he gave himself three different vaccines based on his research and a total of eight... Question: What's the main purpose of the article? - To introduce a few Nobel prize winners who did experiments on themselves. - To list difficulties that scientists went through in order to make important discoveries. - To explain why some scientists chose to experiment on themselves. - To introduce some dangerous experiments that Nobel prize winners did on themselves.
Answer:
To introduce a few Nobel prize winners who did experiments on themselves.