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 Why did ancient Europeans watch for animals on Candlemas Day? A) To amuse themselves. B) To protect their harvest. C) To say goodbye to winter. D) To know when to plant crops.
D

Many years ago, children who had good manners kept quiet if their parents were talking with other persons. Today, well-mannered children have more freedom. Sometimes good manners in one place are bad manners in other place. Suppose you are a visitor in the prefix = st1 /landofMongolia. Some friends ask you to eat with them. What kind of manners do they want you to have? They want you to give a loud "burp" after you finish eating. Burping will show that you like your food. In some countries, if you give a loud burp, you are told to say, "Excuse me, please." In many places people like to eat together. But in some parts of Polynesia, it is bad manners to be seen eating at all. People show their good manners by turning their back on others while they eat. What are good manners like in an East African town? The people try not to see you. They are being polite. You may see a friend. He may not see you at all. If you're polite, you will sit down beside him. You will wait until he finishes what he is doing. Then he will talk to you. Suppose you visit a friend in Arabia. You should walk behind the tents until you come to his tent. If you pass in front of the other tents, you will be asked into them. The people will ask you to eat with them. And it is bad manners if you say no. In Polynesia , to be polite while eating you should _ . A) talk much with others B) sit still C) turn your back on others D) eat quickly
C

Like many other small boys, I was fascinated by cars, not least because my oldest brother was a bit of a car guy and subscribed to cool magazines like Car and Driver and Motor Trend. Every so often, one of those magazines would run an article on the "Car of the Future". They featured unconventional styling and things like small nuclear reactors as power sources. Yet, frankly, my car doesn't do anything that my brother's Studebaker didn't do. It goes, it stops, it burns gasoline, it plays music. I still have to steer it, and it still runs into things if I don't steer it carefully. But guess what? All of these things are subject to change in the not-so-distant future. It will still go and stop, but it may not burn gasoline, I may not have to steer it, and it may be a lot better at not running into things. Airbags aren't the be-all and end-all in safety. In fact, considering the recent news about people occasionally being killed by their airbags in low-speed collisions ,they obviously still need some development. But they aren't going away, and in fact, you can expect to see cars appearing with additional, side-impact airbags, something some European car manufacturers already offer. Better than systems to minimize injury in the event of an accident, however, are systems that minimize the likelihood of an accident happening in the first place. Future cars may be able to eliminate many of the major causes of accidents, including drunk-driving, tailgating and sleepiness. Cars could be equipped with sensors that can detect alcohol in a driver's system and prevent the car from being started, for example. Many accidents are caused by people following the car in front too closely. As early as next year, you'll be able to buy cars with radar-equipped control systems. If the radar determines you're closing too quickly with the car in front, it will ease up on the throttle . For city streets, expect other radar devices that will give advance warning that the car in front of you has slowed abruptly and you should... According to the author, what will future cars do if the sensors detect alcohol in the driver's system? A) They will give a warning in advance. B) They will brake automatically. C) They will ease up on the throttle. D) They will not start.
D