(Question)
Go, known as Weiqi in China and Baduk in South Korea, was viewed as the last game where humans can defeat machines. Lee Se-dol, one of the greatest Go players, has won 18 world championships for 21 years of his professional career. AlphaGo, a computer program developed by Google's DeepMind, beat the European Go champion, an achievement that was not expected for years in October, 2015. The match between Lee and AlphaGo was seen as a representative game between humans and Artificial Intelligence (AI). The match of the century drew great attention from news organizations, Go fans and the general public across the world as well as in South Korea. Go originated from China more than 2,500 years ago. It involves two players who take turns putting markers on a net-shaped board to gain more areas on it. One can occupy the markers of the rival   by surrounding the pieces of the other. Go is considered to be a lot more complex than chess where artificial intelligence scored its most famous victory to date when IBM's Deep Blue beat grandmaster Gary Kasparov in 1997. But experts say Go presents an entirely different challenge because of the game's incomputable number of move options. In other words, the computer must be capable of human-like "intuition"   to win. "I was very surprised because I did not think that I would lose the game," said Mr. Lee.He said AlphaGo's early strategy was "excellent" and that he was shocked by one unconventional move it had made that a human never would have played, which he believed directly resulted in his loss. AlphaGo is proud of a deep learning capability to learn for itself and discover new strategies by playing games against itself and adjusting neural networks   based on a trial-and-error process known as reinforcement   learning. In spite of his loss, he did not regret accepting the challenge. "I had a lot of fun playing Go and I'm looking forward to the future games," he said after AlphaGo won 3-0 in a five-game match. "Playing against a machine is very different from an actual... What did Lee think was the cause of his loss? A) AlphaGo had an excellent strategy and unconventional moves. B) He couldn't sense AlphaGo's breathing and energy in the games. C) He made decisions depending on the rival's physical reactions. D) The designer of AlphaGo was a talent who couldn't be defeated.
(Answer)
A


(Question)
Inland waters may be grouped into two general classes: standing waters and flowing waters. As is often the case, the boundary between these two classes is not sharp and clear. A pond is an example of standing water. But most ponds are fed by springs or brooks and most have an outlet. Thus some current of changing water flows through them. On the other hand, a river is an example of flowing water. In some places, however, a river may have such a slow current that it is very difficult to detect. Standing inland waters differ in size, in age, and in many _ environmental characteristics. They range in size from roadside puddles to the Caspian Sea. Puddles may last for only a few days or weeks; ponds, for a few hundred to a thousand years. In general, lakes are older, though the waters of some tropical "lakes" disappear completely during each dry season. Standing waters vary from very shallow to very deep, from clear to muddy, from fresh to salty. In flowing waters we roughly distinguish between brooks, creeks, and rivers. The size and age of flowing waters are unimportant. Speed of flow, clearness, oxygen content, and other chemical characteristics are used by scientists in studying flowing-water ecosystems. Which of the following statements is true? A) Usually the water in a river flows into a pond. B) Scientists only study flowing-water ecosystems. C) Usually ponds last much longer than puddles. D) The Caspian Sea is considered as an example of flowing water.
(Answer)
C


(Question)
When most of us hear the word chocolate, the verb that comes to mind is probably "eat", not "drink", and the most proper adjective would seem to be "sweet". But for about 90 percent of chocolate's long history, it was strictly a beverage  , and sugar didn't have anything to do with it. The Origin of Chocolate Many modern historians have estimated that chocolate has been around for about 2000 years, but recent research suggests that it may be even older. In the book The True History of Chocolate, authors Sophie and Michael Coe prove that the earliest linguistic   evidence of chocolate consumption dates back three or even four thousand years. Valuable and Fashionable Chocolate Beverage It's hard to discover exactly when chocolate was born, but it's clear that it was cherished from the start. For several centuries in pre-modern Latin America, cacao beans were considered valuable enough to use as currency. 100 beans could purchase a good turkey hen, according to a 16th-century Aztec document. Sweetened chocolate didn't appear until Europeans discovered the Americas and sampled   the native cuisine. Chocolate didn't suit the foreigners' taste at first -- one described it in his writings as "a bitter drink for pigs" -- but once mixed with honey or cane sugar, it quickly became popular throughout Spain. By the 17th century, chocolate was a fashionable drink throughout Europe, believed to have nutritious, medicinal functions. But it remained largely a privilege of the rich until the invention of the steam engine made mass production possible in the late 1700s. The Birth of Solid Chocolate In 1828, a Dutch chemist found a way to make powdered chocolate. His product became known as "Dutch cocoa", and it soon led to the creation of solid chocolate. In 1847, Joseph Fry created the first modern chocolate bar. By 1868, a little company called Cadbury was marketing boxes of chocolate candies in England. Milk chocolate hit the market a few years later. Prosperous Chocolate Industry In America, chocolate was so valued during... It can be inferred from the passage that   _  . A) the history of chocolate is at most 4,000 years. B) people around the world could buy things with chocolate. C) chocolate was well paid attention to since it was born. D) an American at least eats a pound of chocolate per month.
(Answer)

C