Read the article and select the best answer. Article: Across countryside, non-food crops are growing alongside wheat.Some are used in new alternatives to plastics and other materials, but others will simply be burned. Burning crops is becoming more popular because it is good for the planet.Doing so is also cheaper than burning fossil fuels.As more land is devoted to non-food crop production, the economics of crops for fuel are likely to become even more favorable. Humans have been burning such biomass--organic materials from plants or animals-- since they discovered fire.But that burning fossil fuels could have catastrophic consequences has brought biomass back into fashion. Even allowing for emissions of carbon dioxide from fuel used in planting, harvesting, processing and transporting biomass fuel, replacing fossil fuel with biomass can typically reduce greenhouse gas emissions by more than 90 percent. Power stations around the world are experimenting with forms of biomass to add to their coal or oil, with encouraging results.Indeed, power companies could profit by turning to biomass, especially when the subsidies many governments offer for using renewable energy are taken into account. Farmers can benefit from growing biomass.In Europe, the reduction of subsidies for certain crops is exposing farmers to market forces.Instead of being paid for whatever they produce, farmers must seek a clear demand for their product.Many believe that the demand for alternatives to fossil fuels could be just such a driver. But while biomass offers a variety of potential alternatives, the world's infrastructure has developed around burning fossil fuels to such a stage that switching to biomass involves a change in conception that many companies have not accepted. Also, there are problems with using biomass.Although most coal-fired power stations could take a small amount of their fuel from biomass without significant adjustment, few are built to run on biomass alone.Burning some forms of biomass also causes environmental problems.Oils and waste can be smelly, while wood... Question: What do we know about biomass? Options: A: It is a useful way of burning crops. B: It is plant and animal matter used to provide power. C: It is a new alternative to be used widely. D: It is a popular approach to fighting against pollution.
B

Read the article and select the best answer. Article: People often ask me how I became successful in that six-year period of time while many of the people I knew did not. The answer is simple: The things I found to be easy to do, they found to be easy not to do. I found it easy to set the goals that could change my life. They found it easy not to. I found it easy to read the books that could affect my thinking. They found that easy not to. I found it easy to attend the classes. They said it probably really wouldn't matter. Six years later, I'm a millionaire and they are all still blaming the economy, the government and company policies. They neglected to do the basic, easy things. In fact, the primary reason most people are not doing can be summed up in a single word: neglect. It is not the lack of money - banks are full of money. It is not the lack of opportunity - the government continues to offer the most opportunities. It is not the lack of books - libraries are full of books - and they are free! It is not the schools - the classrooms are full of good teachers. We have plenty of good advisors. The major reason that so few take advantage of all that we have is neglect. Don't do the things which cause us to feel guilty and guilt _ our self-confidence. As our self-confidence reduces, so does the level of our activity. And as our activity goes down, so do our results. And as our results suffer, our attitude begins to weaken. And as our attitude begins changing from positive to negative, our self-confidence becomes even less ... and on and on it goes. So my suggestion is that when giving choice of "easy to" and "easy not to", do not neglect to do the simple, basic, "easy" but potentially life-changing activities. Question: Why did the author become a millionaire in six years? Options: A: He was a very lucky man. B: He didn't come across difficulties. C: He did some basic and easy things. D: He set himself long-term life goals.
C

Read the article and select the best answer. Article: A castle is a type of fortified structure built in Europe and the Middle East during the Middle Ages. This is different from a palace, which is no fortified-though there are many similarities among these types of construction. Usage of the term has varied over time and has been applied to diverse structures. The European castles originated in the 9thand 10thcenturies, resulting in its land divided among nobles. These nobles built castles to control the area surrounding them, and they were both offensive and defensive structures. Although army uses are often emphasized in castle studies, the structures also served as centres of administration and symbols of power. Urban castles were used to control the local people and important travel routes, and rural castles were often built near farmland. Many castles were originally built from earth and wood, but had their defences _ later by stone. In the late 12thand early 13thcenturies, scientific approaches to castle defence appeared, and could function to maximize the castle's firepower. These changes in defence came from a mixture of castle technology. Although gunpowder was introduced to be built well into the 16thcentury, improved cannon fire made them uncomfortable places to live in. As a result, true castles went into decline. From the 18thcentury onwards, there was a renewed interest in castles with the construction of mock castles, part of a romantic revival of Gothic architecture, but they had no defensive purpose. Question: What can be inferred from the river? Options: A: Castles have nothing in common with palaces. B: Castles have a history of more than 1,000 years in Europe. C: Castles were mainly used for defensive purposes after the 18 thcentury. D: The introduction of gunpowder instantly influenced castle building in Europe.
B