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Read the following article and select the best answer. Article: Robert Todd Duncan was born in 1903 in the southern city of Danville,Kentucky. His mother was his first music teacher. As a young man,he continued his music study in Indianapolis,Indiana. In 1930,he completed more musical education at Columbia University in New York City. Then he moved to Washington. For fifteen years, he taught music at Howard University in Washington. At that time, not many black musicians were known for writing or performing classical music. Teaching at Howard gave Duncan the chance to share his knowledge of classical European music with a mainly black student population. He taught special ways to present the music.These special ways became known as the Duncan Technique. Besides teaching,Duncan sang in several operas with performers who were all black. But it seemed that he always would be known mainly as a concert artist. However,his life took a different turn in the middle 1930s. At that time, the famous American music writer George Gershwin was looking for someone to play a leading part in his new work Porgy and Bess. The music critic of the New York Times newspaper suggested Todd Duncan. Duncan had almost decided not to try for the part as he knew it would not be easy to get it. But he changed his mind. He sang a piece from an Italian opera for Gershwin. He had sung only a few minutes when Gershwin offered him the part. He became famous because of the part in Porgy and Bess. Todd Duncan gained fame as an opera singer and concert artist. But his greatest love in music was teaching. When he stopped teaching at Howard,he continued giving singing lessons in his Washington home until the week before his death. Question: Based on the passage,what did Robert Todd Duncan love most? - Singing in concerts. - Writing music. - Singing opera. - Teaching music.
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Teaching music.

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Read the following article and select the best answer. Article: Roman Pantheon is one of the greatest achievements of the ancient Romans. The ancient Romans were good architects and they built many wonderful buildings. Another good example of a Roman architectural style is the Roman Coliseum, which is a large building used for public sports events or entertainment. The Roman architectural style has been borrowed by many of the western countries. The architecture of Pantheon is unique to Rome. In Latin and Greek, pantheon means "Temple of all the Gods". Marcus Agrippa built the original Pantheon in 27 BC. But the Pantheon built by Agrippa was completely destroyed in 80 AD when a fire broke out. The Roman Pantheon that is visited by many tourists today was rebuilt in 125 AD by the Roman emperor Hadrian. Hadrian's architects followed the exact design of Marcus Agrippa. Historians believe that the Pantheon was a place of worship because it housed all the gods and goddesses of the ancient Romans. The Pantheon of Rome is an amazing example of ancient Roman architecture. This building has been in use for over 2000 years. The Roman Pantheon is famous for its design, size. The most unbelievable feature of this building is its huge concrete dome . The Pantheon's dome was thought to be the largest, until recent times. Phocas, the Byzantine Emperor presented the Roman Pantheon to Pope Boniface IV to save it from the destruction. In 609 AD, it was turned into a church. During Papal rule, it was used as a burial ground for kings and other famous people. There are tombs of Raphael (a painter), King Victor Emmanuel II, King Umberto I and many more in the Pantheon. Some of the buildings that were constructed on the model of the Roman Pantheon are The Rotunda - University of Virginia, Low Memorial Library - Columbia University, Grand Auditorium - Tsinghua University, Jefferson Memorial - Washington D.C. and Duomo - Florence. Question: The Pantheon which tourists visit at present was built in _ . - 27BC - 80AD - about 125AD - 609 AD
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about 125AD

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Read the following article and select the best answer. Article: In recent years, temperatures in the polar areas are rising faster than anywhere else on Earth. As a result, the ice and the snow are melting at record-setting rates. One result is that sea levels are rising around the world, putting animals and people at risk. A sheet of ice acts like a huge mirror, reflecting the sun's energy. But ocean water, which is darker than ice, absorbs a lot of it. This causes the ocean to warm, which in turn speeds up ice melting and which leads to even more open waters. The cycle continues until all the ice is gone. "As the ice melts, water flows into the oceans, making them less salty. That, along with warmer water temperatures, can harm the creatures that live in, under, and near the ice," says zoologist Michael Stoddard. "Cold-adapted animals -- including polar bears, foxes, hares, and seals -- also need ice for travel and survival." "Most species of fish, sea spiders, and many other animals and plants that live in the waters of Antarctica don't live anywhere else," Stoddard says. "Many of them have special proteins in their bodies keeping them from freezing to death and have other adaptation to the cold that has yet to be explored." Therefore, experts are urging us to reconsider the way we live. The fuels that we burn in cars, power stations, and factories are largely to blame for the carbon dioxide and other greenhouse gases that are trapping overmuch heat in our atmosphere. If we can produce fewer of these gases, we can help save the polar ice. "Even small things would make a difference, if everyone did them." Michael Stoddard says, "That's what we have to figure out in the near future to help save the polar ice and thus protect the oceans and us." Question: From the passage, we can know that _ . - most polar animals prefer to live in less salty water - some of the cold-adapted animals mainly feed on ice - many polar creatures have special proteins to keep alive - scientists still don't know how polar creatures have adapted to the cold
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scientists still don't know how polar creatures have adapted to the cold