Thousands of Irish people starved during the "Potato Famine" because

A、 lose B、 lost C、 have lost D、 are lost

A . has been used B . have been used C . has used D . have used

A . has used B . has been used C . was used D . is used

A . objection B . poverty C . consumption D . famine

A . manufacturing　 B . mining C . energy　 D . animal husbandry

A．French B．Gaelic C．Germanic D．Welsh

plants and animals. However, the world's forests are getting smaller all the time. We are cutting down the trees because we need wood, and we need more farmland. Some people say that there will not be any forests like these in 20 or 30 years. What will happen if they disappear？ If we cut down our forests, a lot of plants and animals will disappear from the world. In a lot of places the new farmland will soon look like the old deserts. Crops will not grow there. It will not rain very often, and the weather will get very hot. Perhaps the climate of the world will change. This will be dangerous for everyone in the world. That is why we must take care of our forests. (1)、The passage mainly tells us about the importance of taking care of plants. A：T B：F (2)、Forests are homes for different kinds of animals. A：T B：F (3)、The need for more wood and more land help to protect our forests. A：T B：F (4)、We'll have more and greater forestsn in 20 or 30 years in some people's view. A：T B：F (5)、The writer thinks it necessary to protect the forests. A：T B：F

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A．contradict B．reform C．counter D．protest

During the past 200 years the world population has increased 6 times, the annual world output has increased 80 times, and the distance a person can travel has gone up 1,000 times. There has also been much recent progress in art, culture, learning, and science. Such changes have led to a high rate of production and growth of the economy. Economists fear that within the next 100 to 150 years, the earth's resources will become very scarce. Their fears are partly justified, but we should not be afraid. Industrial civilization adapts to new knowledge. By advancing knowledge, we not only create new forms of resources, but we also find ways to economize their use. Advanced modern knowledge can feed the hungry people of the world and improve their standard of living. The figures in the second paragraph are used for the following purposes EXCEPT______. A．prediction. B．contrast. C．definition. D．explanation.

The rains hit India hardest in Punjab (旁遮普邦), which was transformed into a wasteland of collapsed houses and dead cattle. In the village of Doomchheri, 40 km southwest of Chandigarh, Punjab's capital, floods rising to a height of 4m washed away 400 of the 700 homes and destroyed all the crops. Jaswant Kaur and her family of five clung to trees when their mud hut collapsed. One cousin drowned; the other four swam to safety, reaching the second story of a neighbor's home. Wailed Jaswant:" What have we done to be cursed like this ？" In the country the armed forces were mobilized to help. In Punjab 5,000 uniformed men used helicopters and assault boats to rescue victims isolated by flood, distribute food and medicine and, finally, remove the dead. Near the town of Patiala, 85 km south of Chandigarh, all 16 members of a rescue team drowned when their boat tipped over in 4m waves. One soldier named Sohan Singh could have survived, witnesses reported, but he ordered panic-stricken villagers to cling to him while he struggled toward safety. His body was found four days later, along with two dead villagers whose arms were wrapped around one of his legs. Which of the following is the best title for the passage？ A．Curse of Heaven B．Floods Hit India C．Floods Claim Hundreds of Lives D．A Terrible Disaster

In ancient Mexico there were many clearings in the forest. In each clearing was a village with fields of different crops around it. The Maya cut down trees with stone axes and planted seeds by digging holes in the ground with pointed sticks. A farmer was able to grow crops that produced food for several people. But not every Maya had to be a farmer. Some were cloth makers, builders, or priests. The Maya believed in many gods. The people built large temples to honor their gods. Skillful workers built cities around these temples. It was difficult to construct these cities, because they had no horses to carry the heavy stone needed. Workers had to carry the building materials themselves. Today, many of these ancient Mayan cities and temples are still standing. Measuring time was important to the Maya, so they developed a system for measuring it accurately. Farmers needed to know when to plant and harvest their crops. Mayan priests made a system to keep track of time. They wrote numbers as dots (...) and bars (- ). A dot was one and a bar was five. The Mayan priests studied planets. They made a calendar from what they learned. The year was divided into. 18 months of 20 days each with five days left over. The Mayan calendar was far more accurate than the European calendars of the time. Around the year 800, the Maya left their villages and beautiful cities, never to return. No one knows why. They may have died from an infectious disease. They may have left because the soil could no longer grow crops. Archaeologists are still trying to find the lost secrets of the Maya. They are still one of our greatest mysteries. This article may be taken from ______. A．a magazine B．a literature book C．an art book D．a historical book

We know from the passage that____. A、the tiger escape lasted a whole day B、the zoo workers planned to shoot the tiger dead C、the tiger wasn’t kept securely enough from the public D、the incident took place on the zoo’s anniversary day

For thousands of years, people have known that the best way to understand a concept is to explain it to someone else. &quot;While we teach, we learn,&quot; said Roman philosopher Seneca. Now scientists are bringing this ancient wisdom up-to-date. They&39;re documenting why teaching is such a fruitful way to learn, and designing innovative ways for young people to engage in instruction. Researchers have found that students who sign up to tutor others work harder to understand the material, recall it more accurately and apply it more effectively. Student teachers score higher on tests than pupils who&39;re learning only for their own sake. But how can children, still learning themselves, teach others？ One answer: They can tutor younger kids. Some studies have found that first-born children are more intelligent than their later-born siblings (兄弟姐妹). This suggests their higher IQs result from the time they spend teaching their siblings. Now educators are experimenting with ways to apply this model to academic subjects. They engage college undergraduates to teach computer science to high school students, who in turn instruct middle school students on the topic. But the most cutting-edge tool under development is the &quot;teachable agent&quot;—a computerized character who learns, tries, makes mistakes and asks questions just like a real-world pupil. Computer scientists have created an animated (动画的) figure called Betty&39;s Brain, who has been &quot;taught&quot; about environmental science by hundreds of middle school students. Student teachers are motivated to help Betty master certain materials. While preparing to teach, they organize their knowledge and improve their own understanding. And as they explain the information to it, they identify problems in their own thinking. Feedback from the teachable agents further enhances the tutors&39; learning. The agents&39; questions compel student tutors to think and explain the materials in different ways, and watching the agent solve problems allows them to see their knowledge put into action. Above all, it&39;s the emotions one experiences in teaching that facilitate learning. Student tutors feel upset when their teachable agents fail, but happy when these virtual pupils succeed as they derive pride and satisfaction from someone else&39;s accomplishment. 1. What are researchers rediscovering through their studies？ A.Seneca&39;s thinking is still applicable today. B.Better learners will become better teachers. C.Human intelligence tends to grow with age. D.Philosophical thinking improves instruction. A、Seneca&39;s thinking is still applicable today. B、Better learners will become better teachers. C、Human intelligence tends to grow with age. D、Philosophical thinking improves instruction.

A．The focusing accuracy of the lens of the eye. B．Eye color and vision. C．Where the beams travel. D．The reflection of the retina.