Read the following article and select the best answer. Article: U.S. first lady Michelle Obama arrived in Beijing on Thursday evening, the official Xinhua news agency said, beginning a hotly anticipated week-long trip during which she will promote education and cultural ties. Obama, a Harvard-educated lawyer, is expected to spend Friday with China's _ first lady, Peng Liyuan, who is admired at home as both a glamorous songstress and fashion icon. Besides Beijing, Obama will visit the western historic city of Xi'an and the southern city of Chengdu, where she will visit a panda preserve. Obama's two daughters are accompanying her, as well as her mother. She also plans to visit American and Chinese students to promote education and cultural exchanges, and visit historical landmarks like the Great Wall of China. Foreign Ministry spokesman Hong Lei said the visit would help deepen ties between the world's two largest economies. "We believe that this visit will play an important role in increasing mutual understanding between the two countries and expanding friendship." Hong told reporters ahead of Obama's arrival. News of Obama's arrival spread fast on Sina Weibo, where users speculated on what the trip would bring - as well as what Obama would wear and eat. "Two intellectual women playing the game of great power politics - how beautiful." wrote one user. Question: From this passage we know that U.S. first lady Michelle Obama _ - is a Harvard-educated lawyer - will visit China alone - arrived in Beijing on Friday evening - will promote laws and cultural exchanges.
is a Harvard-educated lawyer

Read the following article and select the best answer. Article: Thousands of people have been killed in a massive earthquake in Japan. The quake -- the most powerful to hit Japan in more than 100 years -- caused massive _ and many people are missing and feared dead. The 8.9 magnitude quake struck Friday(March 11) off Japan's eastern coast, and prompted tsunami warnings across the Pacific as far away as South America and the U.S. West Coast. Several days after a 8.9-magnitude earthquake and resulting 10-meter-high tsunami devastated the coastline. The United States Geological Survey says it was the fifth largest earthquake since 1900. The largest, with a 9.5 magnitude, shook Chile in 1960. In Japan, the tsunami swept away boats, cars and hundreds of houses in coastal areas north of Tokyo. The quake shook buildings in the Japanese capital and caused several fires. All train and subway traffic in Tokyo has been stopped, and thousands of people there were unable to get back home. People are just trying to find clean water. Food supplies are running out. In the convenience stores, there are no rice balls left. There is no bottled water left. People are facing a really serious situation in the days ahead for these people that are living in areas that were only moderately damaged. The final death toll could range from the thousands to tens of thousands, depending on how many of these communities are gone. Japanese Prime Minister Naoto Kan said the government would do everything it can to minimize the effects of the disaster. And in Washington, President Obama said the United States is ready to help the people of Japan. Question: Which is true according to the passage? - Thousands of people have been killed in a massive earthquake in Japan. - Only people in areas that were only moderately damaged are facing a really serious situation in the days. - The tsunami devastatednot only the coastline in Japan, but also the areas across the Pacific as far away as South America and the U.S. West Coast. - The massive earthquake caused the tsunami.
The massive earthquake caused the tsunami.

Q: Read the following article and select the best answer. Article: We all know what a brain is. A doctor will tell you that the brain is the organ of the body in the head. It controls our body's functions, movements, emotions and thoughts. But a brain can mean so much more. A brain can also simply be a smart person, If a person is called brainy, she is smart and intelligent. If a family has many children but one of them is super smart, you could say, "She's the brains in the family. " And if you are the brains behind something you are responsible for developing or organizing something. For example, Bill Gates is the brains behind Microsoft. Brain trust is a group of experts who give advice. Word experts say the phrase"brain trust" became popular when Franklin D. Roosevelt first ran for president in 1932, Several professors gave him advice on social and political issues facing the U. S.These professors were called his "brain trust. " These ways we use the word "brain" all make sense. But other ways we use the word are not so easy to understand. For example, to understand the next brain expression, you first need to know the word"drain." As a verb to drain means to remove something by letting it flow away. So a brain drain may sound like a disease where the brain flows out the ears. But, brain drain is when a country's most educated people leave their countries to live in another. The brains are,sort of,draining out of the country. However,if people are responsible for a great idea,you could say they brainstormed it. Here,brainstorm is not an act of weather. It is a process of thinking creatively about a complex topic. For example, business leaders may use brainstorming to create new products, and government leaders may brainstorm to solve problems. If people are brainwashed, it does not mean their brains are nice and clean. To brainwash means to make someone accept new beliefs by using repeated pressure in a forceful or tricky way. Keep in mind that brainwash is never used in a positive way. Question: Which of the following expression is always used in a negative way? - Brain trust - Brain drain - Brainstorm - Brainwash
A: Brainwash

*Question*
Read the following article and select the best answer. Article: In South America, the rich soil of the Amazon River basin in Brazil is known as "black gold". Scientists found that the secret of this rich soil was charcoal . Local people made it from animal bones and tree branches. They mixed the charcoal with the soil about 1.500 years ago. Now, scientists in the United States have done a modern demonstration. They say charcoal fertilization offers a revolutionary way to improve soil quality for hundreds or even thousands of years. Mingxin Guo and his team at Delavare State University heated tree leaves, corn stalks , small pieces of wood and poultry waste into "biochar" . They reported their findings at a recent meeting of the American Chemical Society in New Orleans. Biochar could be good news for farmers with poor soil and hungry populations to feed. Professor Guo says it could even help against global warming. Intensive farming and overuse of chemical fertilizer give out carbon dioxide into the atmosphere. Biochar does the opposite, he says. It traps carbon in the ground. The researchers planted winter wheat in containers of soil in a greenhouse -- some with biochar, some without. Professor Guo says the wheat grows much better in the pots with biochar. The soil was added two percent charcoal to. But he says even a one percent treatment will increase productivity. The results demonstrated that biochar can increase organic matter in soil. Loss of nutrients in soil is an increasing problem worldwide as farmers try to grow more food for growing populations. Next, the team will carry out a five-year study of biochar with spinach , green peppers and tomatoes. Mingxin Guo says he learns about the "black gold" in Brazil from a magazine story. He explains that it was discovered in the jungle, in the area where waters flow to the Amazon, in the 1960's. But it was not until recent years that scientists began to bring public attention to it. Question: According to the research, the biochar can help against global warming because it can _ . - reduce the carbon dioxide - keep the carbon in the soil - reduce the loss of nutrients in the soil - absorb the carbon dioxide
**Answer**
keep the carbon in the soil