Article: A blue hole is a flooded sea cave with a hole that opens up at the land's surface. These cave systems form in carbonate rock, often on islands. Some blue holes have very special rock formations and water chemistry. Far below sea level, they contain some of the harshest environments on Earth, with no oxygen and no light. Yet these areas are filled with life forms that have adapted to the extreme conditions. Information gathered from these blue holes is helping scientists to increase their understanding of biology, archaeology and geology. But exploring these blue hole environments brings danger as well as discovery. Blue holes get their name from the color1 some have when seen from the air. The color1 is usually a reflection of the sky on the water. But not all of these cave systems have blue surfaces. Some contain dark or muddy water. Blue holes are the result of erosion in which water breaks down rock. Rain falling thousands of years ago contained chemicals which slowly wore away at the limestone landmass. These holes were later filled with sea water as the sea level changed. The rising and falling of sea levels and the mixture of salt and fresh water further wore away at these cave formations. Blue holes are vertical caves. But they can also have horizontal cave formations that may be hundreds of meters long. These flooded cave systems can be found in the ocean, or they can be found inland. Ocean caves are affected by tides, so they always have water movement. But blue holes on land are very still. They have several layers of water, chemicals, and bacteria. The top layer of fresh water comes from rainfall. This layer acts like a cap on top of the layered mixture, and keeps out oxygen from the atmosphere. The fresh water floats on a denser layer of saltwater. Underneath this is a layer of poisonous hydrogen sulfide, produced by bacteria living in the water. Underneath this layer is anoxic seawater -- water that does not contain any oxygen. Underwater caves are probably one of the least explored ecosystems... Question: According to the Passage, blue holes _ . Yes or no, is the answer "are flooded caves found mostly on islands"?
Yes

(Question)
Article: It's hard to predict the weather in the near future. It's even more difficult to know what the climate of the coming season is like. Now you know the winter of 2011/12 was not warm but a freezing one/ many people in the Northern Hemisphere died of cold. but a Native American tribe was fortunate enough to survive the terrible winter because of what was foretold by a weatherman. One day in early September o 2011 the chief of the Native American tribe was asked by his tribal elders if the winter was going to be cold or mild. The chief asked his _ , but the man also had lost touch with the reading signs from the natural world around the Great Lakes. In truth, neither of them had idea about how to predict the coming winter. However, the chief decided to take a modern approach, and rang the National Weather Service in Gaylord Michigan. "Yes, it is going to be a cold winter," the weatherman told the chief. Consequently, the chief went back to his tribe and told his tribe people to collect plenty of firewood. A fortnight later the chief called the National Weather Service and asked for an update. "Are you still forecasting a cold winter?" he asked. "Yes, very cold," the weatherman told him. As a result of this brief conversation the chief went back to the tribe people to collect every bit of wood they could find. A month later the chief called the National Weather Service once more and asked about the coming winter. "Yes," he was told, "it s going to be one of the coldest winters ever." The weatherman was right! And the Native American tribe went comfortably through the terrifying winter. The chief was thankful and curious. He rang the weatherman again and asked, "How can you be so sure about it tat it was freezing winter?" The weatherman replied, "Because the Native American tribe of the Great Lakes are collecting wood like crazy." Question: The chief rang the weatherman several times out of _ . Yes or no, is the answer "doubt"?
(Answer)
No

Ques: Article: I woke up late and had breakfast in a hurry.I had never been late and didn't want my boss to be unsatisfied. However,it seemed that the day wasn't a lucky one for me from the very second I left my flat.The moment I wanted to rush downstairs,one of my stiletto heels broke.I had to return to change my red shoes.I also had to change my purse and other little things that I had tried to match with the shoes.I was sure I would be late for work. On my way to work I had to wait for over half an hour because of an accident.I had no choice but to wait.I phoned my boss and he told me that it was no problem,but he needed me for the meeting with the Japanese clients that morning. Finally,I arrived at the office one hour later.I had to keep calm and be fresh for the meeting to make the clients sure that our plan was the best for their future business project.However,I left the plan I had made the night before at home and was going to make a presentation about it to the clients.I was about to get angry when I realised that I had a copy of it in my office. At last,the meeting came to an end and it turned out to be a success.But I have to say that I had a terrible day,full of incidents. Question: According to the passage,what could we learn about the writer? Yes or no, is the answer "She often arrived at her office on time."?
Ans: No

Ques: Article: Weeks have passed since the world lost contact with Malaysia Airlines flightMH370and its 239passengers and crew. Although there is little hope of finding any of the passengers and crew alive,China has been making all-out efforts to find what remains of the plane in the southern Indian Ocean,where the plane is believed to have crashed.The search operations involve the navy,the marine police,scientific research and so on.While China's authorities and military forces have passed the test,the search operations have also shown some weaknesses.It is necessary to address these problems because China is a nation that faces many natural disasters. Lack of professional equipment has been the most notable problem.Among all the ships involved in the search for MH370,only Nanhai jiu 115and Donghai jiu 101and a few other ships have professional rescue equipment.There are also gaps between China and the US in other technologies such as sea-probing equipment and telecommunications.China mainly sent transporter planes,which lacked the necessary equipment to probe the ocean.While the United States sent P-3C and P-SA planes and MH60-R helicopters with equipment that can probe to depths of 76meters and cover 770sq kilometers in four hours. China's technology clearly needs to be improved,After the plane lost contact on March 8,more than one satellite received signals from it,but there is no report of any of China's satellites receiving a signal. Besides technology,China urgently needs to strengthen its international soft power,because almost all the important information was first obtained by Western media,which put pressure upon the Malaysian government for more timely and accurate information.Chinese media mainly forwarded the news broken by their Western colleagues. Last but not least,more attention should be paid to international cooperation.The search and rescue efforts could well have been a race against time to save lives,but limited by international laws and the absence of cooperation mechanisms,China and some other... Question: What is China's most urgent problem to be deal with in rescue work according to the passage? Yes or no, is the answer "Lack of professional equipment."?
Ans:
Yes