Read the following article and select the best answer. Article: The way we get about has a deep influence on the way we live-affecting where we set up home, work and holiday. So what changes might come in the way we get around? What big ideas are out there, and do they have any chance of coming true? Personal Air Travel The idea: flying cars Developments in light small plane technology will make it possible for everyone to own what are, in fact, flying cars. They will have closed cabins, heating, stereos and room for two people. You will take off from a field near your home and fly to towns and cities. After landing, you will take off the fixed wing and continue your journey by road just as if you were traveling by car. Fuel efficient engines and the advantage of being able to travel in the sky will keep costs and the environmental influence down. Flying for Fun The idea: Jet Packs The idea was a hit when a stuntman flew around on one during the opening ceremony of the 1984 Los Angeles Olympics, which was very successful. You'll be able to use the equipment-roughly the size of two scuba tanks fastened to your back-for short journeys. They will be handy for cleaning hard-to-reach windows, arriving in style at a party and shopping. Taxis The idea: driverless taxis These computer-controlled taxis will take you wherever you want along a fixed route, whenever you want to go. For the price of one person's bus fare, several people can ride at speeds of up to 25 mph, and there will be fences to guard against accidents. There will be little, if any, wait for the use of the taxis, which will leave from stations and will be used by prepaid cards. The taxis, which will travel on a 1.5 m-wide track, will use 75% less energy per passenger than a car and 50% less than a bus. Question: As for driverless taxis, we can infer that _ . - we can go wherever we want in them - they will be both convenient and safe - it costs more to take them than to take ordinary cars - they will be operated by computers as well as by people
they will be both convenient and safe

Read the following article and select the best answer. Article: Barbara and Barry Zucker - Pinchoff, both doctors from New York City, took their three daughters on a walking safari last year in Tanzania. Barbara told about their experience in Kinbero, "It is the most remote place we have ever been to," camping with a few other Americans, two Tanzanian guides, and several Hadza who had time to sit and chat because they had just killed a giraffe. About 400 members of the Eastern Hadza tribe live in Tanzania today, the only hunter-gatherers who remain in Africa. The Hadza hunt game, gather edible plants and honey, and move from place to place whenever the weather changers. Every two weeks or so, they move to a new campsite. At the Pinchoffs' campsite, three Hadza men stopped by to visit and ended up staying three days. One of the guides gave the men a cigarette. They took out the tobacco, put it in a pipe, and lit the pipe with fire they started. It takes less than two hours for Hadza women to build a new camp. They make huts by bending branches into round structures about six feet high, and then covering them with long, golden grass. If the weather is very wet, the women may choose a dry cave to set up a camp. Some rock caves have been used over thousands of years and are decorated with ancient rock paintings. Whether they sleep in huts, caves or in the open, the Hadza cover themselves only with thin cloths and depend on fire to keep them warm. The Hadza refuse to be "settled" into villages or to have the life of farmers. By 1979, almost all of them had returned to their old ways. They Hadza may be the only tribe in Africa the has never paid taxes. Question: The passage mainly tells up_. - one of the author's travel experiences - the life of the Hadza tribe in Tanzania - Barbara's walking safari in Tanzania - the efforts of the Hadza to keep their old ways
the life of the Hadza tribe in Tanzania

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Read the following article and select the best answer. Article: Grasslands need time to rest when cattle and other animals feed on them. Moving animals from one area of pasture to another can provide the time needed for new growth. This is called rotational grazing . Rotational grazing is good for the land and the animals, and it can save money. This form of grazing can reduce the need for pesticide treatments by reducing the growth of weeds. And it can limit the need for chemical fertilizers by letting animal wastes do the job of natural fertilizer. Rotational grazing can even help prevent wildfires by keeping grasslands in good condition. Letting animals feed continually and intensively in the same grazing areas can require costly replanting. Animals eat the most desirable growth first. When that keeps happening, the roots do not have enough time to recover. As a result, less desirable plants may replace them. Intensively used grasslands are also harmed as the soil is continually crushed under the weight of heavy animals. While rotational grazing can save money over time, it also requires planning. And that starts with a good map to mark fences, water supplies and grazing areas. Changing methods of grazing also requires time. Farmers may want to put up electric fences to enclose grazing areas, called paddocks. The paddocks will need water. Some farmers design a path for animals from different paddocks to drink from a common watering place. Farmers can start rotational grazing by removing animals from a pasture when the grass is eaten to less that five centimeters. The pasture is then kept empty until the grass grows to more than fifteen centimeters high. Sheep and goats may require special preparations. They may need stronger fences than other animals. And while they eat the grass, they may need guard animals to protect them from animals that would like to eat them. Question: Why do sheep and goats need guard animals? - They can easily jump over fences. - They don't like to stay in the paddock - wild animals are likely to attack them - Tigers and lions prefer sheep and goats
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wild animals are likely to attack them