In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.

[EX Q]: Article: Whales live in the ocean, but they are not fish. They are warm-blooded mammals and must have air to breathe. The babies are born alive and drink milk from the mother's body. It took millions of years for the whale to develop as it is today. Every spring groups of whales swim hundreds of kilometers to warm places to bear their young. Each group goes to the same place every year. The mothers take very good care of their babies. The fully grown whales are very gentle and playful with each other, and with humans. They "talk" to each other with a high noise that sounds beautiful. This"talking" can be heard for more than 300 kilometers in open waters. Yet humans kill over a hundred whales a day. They kill them to make whale oils and a lot of other things. Killing them is a modern business with modern machines and even harpoons( ) that explode( ) inside the whales. A whale dies very slowly and in great pain. Some ships kill every whale they can find, even the mothers and babies. Then there are no young whales to grow up or to bear more young.
Answer: whales are fish
[EX A]: A commonly mistaken belief is that _ .

[EX Q]: Article: Few, if any, instruments shape national culture more powerfully than the materials used in schools. Textbooks are not only among the first books most people meet; in many places they are, along with religious texts, almost the only books they have. A study in South Africa showed that fewer than half of pupils had access to more than ten books at home. In 2010 a study by Egypt's government found that, apart from school textbooks, 88% of Egyptian households read no books. The degree to which a government keeps control of the textbooks used in classrooms is a good guide to its commitment to ideological control. Where that desire is strong, governments are likely to produce the textbooks themselves or define carefully what goes into them. America's State Department employs people to keep an eye on other countries' textbooks, in an effort to understand better how their people think and what their governments want them to think. Other countries probably do the same. Textbooks have long been a source of worry. After the attacks on America on September 11th 2001, some in both America and Saudi Arabia, including officials, supposed that Saudi Arabia's curriculum of intolerance was responsible, at least in part, for the emergence of al-Qaeda . Sometimes the requirements of the state are more clearly seen in what textbooks leave out. The world has long criticized Japan for the way its textbooks whitewash the country's history, in particular dressing up Japanese war crimes. The "New History Textbook", for example, which was submitted for government approval in 2000, played down Japan's aggression in the Sino-Japanese war of 1894-95 and the occupation of China in the 1930s and 1940s, and avoided mention of the use of sex slaves by its armies or the rape of Nanjing. In America most of the disputes about textbooks are home-grown. Liberals worry that their children are being taught a nationalistic version of history that emphasizes the wonders of industrialization and plays down slavery and the killing of Indian tribes. By contrast, Conservatives complain about inadequate education of love for their country and too much secularism . In 2010 the Texas board of education managed to remove Thomas Jefferson, author of the Declaration of Independence, from the state's list of important revolutionary figures, apparently because of Jefferson's insistence on the separation of church and state. He was, however, swiftly restored. As long as textbooks are issued or approved by the state, they will remain a political issue. But as access to other textbooks is enjoyed more widely, some of the dominance they now enjoy will weaken.
Answer: to inform the readers of present practices of textbooks
[EX A]: The author's purpose of writing this passage is_.

[EX Q]: Article: A green house is a building made of glass which is used for keeping warm when the outside temperature is low. In a similar way there are several gases in the atmosphere (mixture of gases that surround the earth) which trap the heat produced by the sun and prevent it from escaping. These gases are known as "greenhouse gases". And the way in which they trap heat in the atmosphere is called the "greenhouse effect". This is not simply air pollution. Most of the main greenhouse gases exist naturally in small amounts in our atmosphere, and without them the earth would be 30 degrees colder and human life would not exist. In other words, the greenhouse effect is a natural course which is to some degree helpful to us. The problem is that in the last century and a half, we have been putting too many of these gases into the earth's atmosphere by burning large quantities of coal and oil and by cutting down forest. The rapid increase in greenhouse gases is making the world warmer. The world's temperature has already gone up by half a degree this century, and the sea level has risen by 10 centimetres. If the amount of carbon dioxide in the atmosphere doubles, there will probably be a rise in the earth's temperature of between I and 4degC;. This may seem a small increase, but it would be enough to cause major changes in geography and agriculture. Large areas of the world would be flooded, and some areas would become dry and unable to produce crops. It is important, too, to consider that there may be a delay of about 30 years in the greenhouse effect. This means that we are probably experiencing only now the effect of the gases put into the atmosphere before the 1960s. Since then, our use of these gases has greatly increased.
Answer: a natural course that is to a certain degree useful to us
[EX A]:
According to the passage, we can know "greenhouse effect" means _ .