Problem: Write a multi-choice question for the following article: Article: A farm planted levels or floors is called a vertical farm. A skyscraper type building can house a vertical farm. Since the garden is built upwards,rather than outwards,it requires much less space than a conventional farm. The world is quickly running out of room for conventional farming. Vertical farms could be a key to this situation. An 18story vertical farm could feed as many as 50,000 people,all in an area which is the size of the average city block. Vertical farms in the city could cut down on transportation costs as well. Think about the amount of fuel it takes to transport food from farmland to city. The resources saved would be surprising. Besides saving travel time,food would be delivered in fresher condition and with less damage. There is a growing concern about the use of pesticides in agriculture today. But the vertical farm would be a greenhouse type environment, avoiding the need for a large number of pesticides. Vertical farms can be built in a contained space,therefore they are an excellent solution for living well in an environment far different from our own. Hydroponics could be a big part of vertical gardening. This would reduce the amount of soil needed to grow food. Of course,not all food does well with this type of planting,but there are many crops that actually seem to do better. In some climates,a lack of sunlight creates a short growing season. The solar power option may not work as well here. The addition of grow lights would make it possible to grow crops in vertical gardens in these areas .In other words,we could grow crops in areas where we never could before. Vertical farms may just be a concept for now,but they are a concept that will solve many of our problems in the future.

A: Question: Compared to the conventional farm, the vertical farm can _ .Options:A depend far less on sunlightB greatly increase the use of soilC help to protect the limited gardensD reduce the use of harmful pesticidesAnswer:D

Problem: Write a multi-choice question for the following article: Article: How the Grand Canyon was created remains one of the geology's greatest mysteries. Some evidence suggests that the process was a gradual one in which the Colorado River (which runs through the canyon) slowly cut deeper and deeper into the ground over millions of years. But volcanic rock samples taken from the canyon now suggest that the canyon was down-cut instead. Down-cutting is when a flood of water rushes over a landscape with enough force to cut deeply into the ground and leaves behind a canyon. Such a flood is usually released when a natural or man-made dam bursts. Robert Webb, a research geologist, says natural dams seem to have formed and broken across the Colorado River several times during the last million years. The dams were built when lava from the eruptions of nearby volcanoes flowed into the river. The lava hardened into hard rocks and blocked the river, causing it to back up and form a lake. Each time the lake grew so huge that it broke the rock dam, releasing a flash flood that furthered the down-cutting process and deepened the canyon. Down-cutting is not just an earthly event. Satellite photos sent back from Mars suggest that the process has happened there, too, say many other researchers. The photos, taken by the Mars Global Surveyor, indicate that an enormous lake existed on Mars 3.5 billion years ago. The lake spilled into a large nearby hole. One edge of the hole broke, releasing a flash flood that quickly carved out a grand canyon. The existence of down-cutting on Mars is just one more piece of evidence that the cold, dry planet was once warm and wet.

A: Question: In the past, deep canyons were believed to have formed _ .Options:A as a result of a sudden break of volcanoesB due to river flows over millions of yearsC owing to the burst of artificial damsD thanks to our ancestors' creative workAnswer:B

Problem: Write a multi-choice question for the following article: Article: Though my career as a banker was financially rewarding, I was never content with the work. I was annoyed by my workmates' coldness and endless counting. Gradually, I began to envy my wife Julie's teaching career, which was full of passion and challenges. However, I admitted that leaving a secure(, ) position and going to school needed courage. One winter evening I heard Julie complaining about a student's bad academic performance. She said, "Baxter used to do his homework very well, but it has dropped recently." The next evening when I arrived home, Julie asked, "Will you drive me to Baxter's house? I want to talk with his family about his homework." After an hour, a hut stood before us. Baxter was busy gathering firewood in the front yard. Seeing us, Baxter was surprised, but greeted us happily. Julie asked, "Where are your parents?" Baxter said they were not in. We found that it was dark in the hut. On our way home, Julie cried, "His work was good in the early autumn when the days were longer. But now, in the dark, he can't do his homework." Then she decided to help him so that he could focus on his studies. I was moved by her kindness and I wanted to help poor students. At the end of the month, I said goodbye to the bank. Now I am teaching the students and I love my job.

A: Question: Which of the following might be the most proper description about Julie?Options:A Patient but powerful.B Kind and helpful.C Firm but firendly.D Hardworking and practical.Answer:B

Problem: Write a multi-choice question for the following article: Article: In 1826, a French man named Niepce needed pictures for his business. But he was not a good artist. He invented a very simple camera. He put it in a window of his house and took a picture of his garden. That was the first photo. The next important date in the history of photography was in 1837. That year, Daguerre, another Frenchman, took a picture of his reading room. He used a new kind of camera in a different way. In his picture you could see everything very clearly, even the smallest thing. This kind of photo was called a Daguerreotype. Soon, other people began to use Daguerre's way. Travelers brought back wonderful photos from all around the world. People took pictures of famous buildings, cities and mountains. In about 1840, photography was developed. Then photographers could take pictures of people and moving things. That was not simple. The photographers had to carry a lot of films and other machines. But this did not stop them, for example, some in the United States worked so hard. Mathew Brady was a famous American photographer. He took many pictures of great people. The pictures were unusual because they were very lifelike. Photography also became one kind of art by the end of the 19thcentury. Some photos were not just copies of the real world. They showed our feelings, like other kinds of art.

A:
Question: The Daguerreotype was _ .Options:A a FrenchmanB a kind of pictureC a kind of cameraD a photographerAnswer:D