instruction:
In this task, you're given an article, a question which often contains a blank and four options (associated with "A", "B", "C", "D"). Your task is to find the correct answer (from the given options) for the question from the given article and return one of the options from "A", "B", "C", and "D". Do not generate anything else apart from one of the following characters: "A", "B", "C", "D". There is only one correct answer for each question.
question:
Article: Robert Frost was at heart a mean-spirited human being, not the kind of man one would expect to write poetry. He was born in San Francisco. Frost entered Dartmouth University in 1893, but dropped out, and switched to Harvard, which he attended for two years. He started a brief teaching career, where he was inspired to become a poet by some of his students' work. Frost stopped teaching and became a farmer. During this time he wrote numerous poems, and a couple of short stories. While he was a farmer he started to think seriously about becoming a famous poet. In almost all of his poems, Frost wrote in the first person. The first widely-read poem that he published was called My Butterfly. At first his audience was very small, but with his Collected Poems he became famous. Robert Frost received almost all the awards that there were for poetry. His poetry describes the forces of nature, and the violence and deep emotional needs of human beings, which reflect the experiences of his childhood. Robert Frost will always be known as one of the best poets in history. His way of putting emotion and violence into words is remarkable . His talent for poetry is natural-born and he had discovered this when he started to farm. Even though he treated his wife and children terribly, he still became one of the best-known poets of his and our day.
Question: We can learn from the passage that _ .
Options: (A) Robert Frost had been a famous writer before he started teaching (B) Robert Frost wrote his poems mostly in the first person (C) Robert Frost was very famous at the beginning of his writing career (D) Robert Frost began to write poems when he was a teacher
answer:
B

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Article: The economic growth that many nations in Asia and increasingly Africa have experienced over the past couple of decades has transformed hundreds of millions of lives - almost entirely for the better. But there's a _ to that growth, one that's evident - or sometimes less than evident - in the smoggy, smelly skies above cities like Beijing, New Delhi and Jakarta. Thanks to new cars and power plants, air pollution is bad and getting worse in much of the world, and it's taking a major toll (,) on global health. How big? According to a new analysis published in the Lancet, more than 3.2 million people suffered deaths from air pollution in 2010, the largest number on record. That's up from 800,000 in 2000. And it's a regional problem: 65% of those deaths occurred in Asia, where the air is choked by diesel soot from cars and trucks, as well as the song from power plants and the dust from endless urban construction. In East Asia and China, 1.2 million people died, as well as another 712,000 in South Asia, including India. For the first time ever, air pollution is on the world's top - 10 list of killers, and it's moving up the ranks faster than any other factor. So how can air pollution be so damaging? It is the very finest soot - so small that it roots deep within the lungs and then enters the bloodstream - that contributes to most of the public - health toll of air pollution including death. Diesel soot, which can also cause cancer, is a major problem because it is concentrated in cities along transportation zones affecting overpopulated areas. It is thought to contribute to half the deaths from air pollution in urban centers. Fro example, 1 in 6 people in the U.S. live near a diesel - pollution hot spot like a rail yard, port terminal or freeway. We also know that air pollution may be linked to other non - deadly diseases. Fortunately in the U.S. and other developed nations, urban air is for the most part cleaner than it was 30 or 40 years ago, thanks to regulations and new technologies like the catalytic converters that reduce automobile emissions. Govemments are also pushing to make air cleaner - see the White House's move last week to further tighten soot standards. It's not perfect, but we've had much more success dealing with air pollution than climate change. Will developing nations like India eventually catch up? Hopefully - though the problem may get worse before it gets better. The good news is that it doesn't take a major technological advance to improve urban air. Switching from diesel fuel to unleaded helps, as do newer and cleaner cars which are less likely to send out pollutants. Power plants - even ones that burn mineral fuels like coal - can be fitted with pollution - control equipment that, at a price, will greatly reduce smog and other pollutants. But the best solutions may involve urban design. In the Guardian, John Vidal notes that Delhi now has 200 cars per 1,000 people, far more than much richer Asian cities like Hong Kong and Singapore. Developing cities will almost certainly see an increase in car ownership as residents become wealthier - and that doesn't have to mean deadly air pollution. Higher incomes should also lead to tougher environmental regulations, which is exactly what happened in the West. We can only hope it happens before the death toll from bad air gets even higher.
Question: What tends to give rise to the highest death toll according to the passage?
Options: (A) The lack of tight environmental protection standards. (B) The increasing numbers of the diesel cars and trucks. (C) The frighteningly high death rate from deadly cancer. (D) The world's serious air pollution such as soot and dust.
answer:
D

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Article: We Americans are wasteful people, not used to saving. Early settlers, our forefathers set us an example of wasting everything, for they thought nature's resources were so plentiful that none of them ever imagined that natural materials would be used up in time. Within a few years of the first Virginia settlement, for example, pioneers burned down their houses when they were ready to move west. They burned down their houses with only one aim to get the nails for future use. No one ever gave a thought to the priceless hardwoods that went up in smoke. As a people we destroy many valuable things that other people save. I noticed this when I was living in Britain. I received a letter from one England's largest banks. It was enclosed in a used envelope that had been readdressed to me. Such a practice would be unthinkable in the United States. American banks, even the smallest, always use expensive stationery with the names of all twenty - eight vice - presidents lists on side of the page.
Question: According to the passage, we know the writer is _ .
Options: (A) a Chinese (B) a Japanese (C) an Englishman (D) an American
answer:
D