Read the article and select the best answer. Article: Several years ago, the mayor of Chicago, Illinois, visited Germany, a leader in green roof design. Later he decided to have vegetation planted on Chicago City Hall. Today, the tops of many other buildings also look like parks. In Canada, the Coast Plaza Hotel in Vancouver has a forest on its roof. New York City has an unusual example farm for hydroponics. The farm is on a boat called the Science Barge. Rainwater and river water are used to grow lettuce, tomatoes, cucumbers and peppers. The farm shows the possibilities for designing rooftop systems. Green roofs are designed to save energy and capture rainwater. Rooftops covered with plants help keep buildings cool. They can extend the life of a roof. And they can reduce water running off into streets and storming water systems. Experts say green roofs usually do not get much above 27degC. So temperatures might not be a problem for growing. But rooftop gardeners have to be careful not to put too much weight on the roof. This is true whether plants are grown in soil or water. Earlier in 2008, researchers in Texas reported that green roofs can reduce a building's air conditioning costs by about onefifth compared to blacktop roofs. But they also reported that not all green roofs perform equally well. They found that designs differ in their ability to keep buildings cool and to capture rainwater. The researchers put experimental roofs on top of metal insulated boxes, to recreate green roof conditions. The study compared products from six companies to help businesses understand how to improve their designs. Each rooftop had sixteen different kinds of plants native to Texas. The researchers say the presence of native plants likely helped all the green roofs capture water better compared to sedums. Sedums are plants that need little water and often are used on green roofs. The native plants could take in more water and release more of it to the atmosphere. Question: The advantages of green roofs are mentioned in the passage EXCEPT _ . Options: A: changing the local weather B: prolonging the roof's life C: keeping the house cool D: reducing the house's air conditioning costs
A

Read the article and select the best answer. Article: Many jobs must be done with two people. One person takes the lead. The other helps. So it is with the human body. Much of our body depends on the cooperation between substances. When they work together, chemical reactions take place smoothly. Body systems are kept in balance. Some of the most important helpers in the job of good health are the substances we call vitamins. The word "vitamin" dates back to Polish scientist Casimir Funk in 1912. He was studying a substance in rice. Funk believed the substance belonged to a group of chemicals known as amines . He added the Latin word "vita", meaning life. So he called the substance a "vitamine"--an amine necessary for life. Other studies found that not all vitamins were amines. So the name was shortened to vitamin. But Funk was correct in recognizing their importance. Scientists have discovered 14 kinds of vitamins. They say vitamins help to carry out chemicals changes within cells. If we do not get enough of the vitamins, we are at risk of developing a number of diseases. _ brings us back to James Lind of Scotland. In the 1740s, Lind was a doctor for the British Navy. He was investigating a problem that had existed in the Navy for many years. The problem was the disease scurvy . The sailors were weak from bleeding inside their bodies. Even the smallest wound would not heal. Doctor Lind thought the sailors were getting sick because they failed to eat some kinds of foods when they were at sea for many months. Doctor Lind separated twelve sailors who had scurvy into two groups. He gave each group different foods to eat. One group got oranges and lemons. The other did not. The men who ate the fruit began to improve within seven days. The other men got weaker. However, which foods should be eaten to keep us healthy? Let us look at some important vitamins for these answers. Question: What is the main topic of the passage? Options: A: Food to keep us healthy. B: The benefits of vitamins. C: Research into scurvy. D: Facts about vitamins.
D

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Read the article and select the best answer. Article: Frank Lloyd Wright is often called the father of American modern architecture.He designed buildings and homes across the United States for more than 70 years.He created most of his works from 1900 through the 1950s,but his open-living spaces and imaginative designs still appear very modern today. Last week,the United States nominated 10 of his buildings for the UN Educational,Scientific,and Cultural Organization--or UNESCO--the World Heritage List.The World Heritage List recognizes the most,important cultural and natural sites worldwide. The 10 buildings,titled."Key Works of Modern Architecture by Frank Lloyd Wright,"were built between 1906 and 1969.They include several of his personal homes and studios,churches,government buildings,private residences,and one very famous museum--New York City's Guggenheim Museum. The Solomon R.Guggenheim Museum is one of the most visited sites in New York City.About one million people visit it every year.Frank Lloyd Wright worked on it from 1943 to 1959.It was designed to create a new type of space for new types of art.The museum remains an international symbol of modern architecture that represents Wright's unique design. Many of Mr.Wright's modern buildings and homes in the U.S.Midwest have also become symbols of modern American architecture.Richard Longstreth is the president of the Frank Lloyd Wright Building Conservancy.He calls Mr.Wrisht"the father of modern architecture,fundamentally redefining the nature of form and space during the early 20th century that would have enduring impacts of modern architecture worldwide." The UNESCO World Heritage Committee will announce its decision in mid-2016.If Frank Lloyd Wright's 10 buildings were chosen for the list,they would be the first World Heritage listings for modem U.S.architecture.The World Heritage List already includes 22 other American sites,including the Grand Canyon,Yellowstone National Park and the Statue of Liberty. Question: What's the best title of the passage? Options: A: Frank Lloyd Wright--the Father of American Modern Architecture B: The World Heritage List--Cultural Collection Worldwide C: Guggenheim Museum--International Symbol of modern Architecture D: Frank Lloyd Wright'Buildings--On the way to World Heritage List
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D