Read the following article and select the best answer. Article: Think about the different ways that people use the wind. You can use it to fly a kite or to sail a boat. Wind is one of our cleanest and richest power sources, as well as one of the oldest. Something shows that windmills began to be used in ancient Iran back in the seventh century BC. They were first introduced to Europe during the 1100s, when armies returned from the Middle East with knowledge of using wind power. For many centuries, people used windmills to make wheat into flour or get water from deep underground. When electricity was discovered in the late 1800s, people living in faraway areas began to use them to produce electricity. This allowed them to have electric lights and radio. However, by the 1940s when electricity was available to people in almost all areas of the United States, windmills were hardly used. During the 1970s, people started becoming more cared about the pollution that is created when coal and gas are burned to produce electricity. People also realized that the supply of coal and gas would run out one day. Then, wind was rediscovered, though it means higher costs. Today, there is a global movement to supply more and more of our electricity through the use of wind Question: What is the best title for this passenger? - The clean and rich wind power - Windmills were used everywhere - The development of the wind power - Windmills and the heavy pollution
The development of the wind power

(Question)
Read the following article and select the best answer. Article: A survey shows that the number of fires in government buildings each year is small compared to home fires. This is probably because such buildings are taken good care of and managed. However, at home after work fire safety is your own duty. For most of us who live in high-rise buildings, the safety of you and your family depends on how much you know to do with an emergency . When a fire happens, there is usually little time to decide what to do or how to act. The best thing is to make your emergency plan as soon as possible. Sit down with the family and prepare a careful escape project. Do remember that every fire is _ . Fire and smoke can move very quickly and the situations in any part of the building may change very quickly. Smoke is usually more dangerous than fire. It can spread throughout the building and enter your house when the fire is many floors away. Some information says it is best to leave your house immediately when there is a fire. Others say it is safer to stay there. Which is correct? Usually the best thing to do is to leave the building as soon as possible. However, do not try to leave your house a long time after the fire alarm has sounded. There is a higher chance that heavy smoke has already spread into stairways and hallways. Never travel through smoke. You must stay inside your house and place wet towels at the bottom of the door to stop smoke from entering. Call the Fire Services Department by dialing "119", tell them where you are and then move to the most smoke-free room. Open the window there to let in fresh air if possible. Hang a sheet from the window to show fire fighters where you are. Question: If it is a long time since the fire alarm sounded, the proper thing to do is _ . - to try to put out the fire - to stay inside the house - to leave the house at once - to sit down with the family
(Answer)
to stay inside the house

Ques: Read the following article and select the best answer. Article: When was the last time you saw three men running down a forest trail in the rain wearing flip-flops ?That's what my friend Brandon, Josh and I were doing last autumn. We were looking for a waterfall .We didn't have much time to get to the waterfall and back, so we were running. We were wearing flip-flops to prevent our shoes getting dirty. It was raining, but lightly. It kept us cool as we climbed over giant stones and through a shallow stream. We followed red arrows and crossed that stream several times, walking on toward the promised waterfall. Time was not on our side, however, and we were forced to turn around. As we started back, we looked at the shallow stream we had just crossed. Where did this rushing river come from? That was when we realized a flash flood was around! In the few minutes the water rose at a fast speed. Now there were no big stones to be seen-only what looked like lumps covered with rushing water. We had no choice but to move our way back carefully in the rushing water -in flip-flops. We had crossed the stream not once or twice, but six times in search of a waterfall that we never even reached! With most of the crossings, we needed each other's help if we didn't want to be washed away by water. Wet all over, we felt relaxed after we made the last crossing. "My dad always told me to keep off a river when travelling in the rain." Josh said as we hurried back down the path. "Why didn't you tell us that earlier?" I laughed. "Would it have made a difference?" came the reply. He had a point. Question: Why were there no big stones to be seen in the stream when they came back? - The big stones were moved away by someone else. - They were running too fast to notice the big stones. - The big stones were covered with rushing water. - The big stones were washed away by rushing water.
Ans: The big stones were covered with rushing water.

Question: Read the following article and select the best answer. Article: These days haze is around us here and there. In fact,everyone has the power to change their living habits to help reduce it. Many local governments call on their people to take action to make the air cleaner. Transport is one of the biggest contributors to haze. When,where,how,why and what you drive all affect air quality. When one drives to work for one year,he uses as much energy as a bus rider uses in 10 years. So walk or ride your bicycle to work or school whenever possible. If it is necessary,you can use public transport instead of your car. Each person using public transport for a year instead of a car can save nearly a tonne of pollutants,including CO2,from going into the atmosphere. Carpooling is another way to reduce carbon emissions .Carpooling is the sharing of car journeys so that more than one person travels in a car. It immediately reduces your car's emissions by half. What you do inside your living space can have a big effect on the air quality outside it. You can do a lot of things inside and around your home that will help you pollute less and save some money. A large amount of our energy supply comes from burning coal,another contributor to haze. By cutting down your electricity use,you are cutting down on haze. So you may try to reduce your use of electricity by turning off lights,using your air conditioner wisely during the summer months,or updating some of your electrical appliances to low-energy models. For example,you can use energy-saving lamps that require less energy and last 10 times longer than common bulbs. Question: We can infer from the passage that the writer thinks _ . - cars can be used only when people have to - cars should be given up as soon as possible - cars must be improved to reduce air pollution - cars may cause the most serious pollution of all
Answer:
cars can be used only when people have to