I'm taking a test and have to guess the right answer to the question after the article. Article: As rain begins to fall from the clouds, it is very pure. However, as it falls through the air it dissolves some of the gases in the air. It also collects bits of dust and microbes that are floating in the air. When the rain reaches the ground it begins to pick up more dust and dirt. Many kinds of mineral substances dissolve in the water. Sand and mud cannot dissolve in water. Since water is so important to us, it is very important that the water we use should be clean. Otherwise, we might get some of the diseases that are carried by water. Many microbes are harmful. They are so small that we cannot see them. These microbes must be removed or killed before the water is suitable for drinking. For example, microbes of diseases like cholera live well in water. If the water supply is not clean, people who drink this water may get these diseases. Thus, to provide people with clean water, the government purifies the water. Purification is a long process and includes three stages: storing, purifying and distributing . The first stage is storing. Man-made lakes are used for this purpose. Water from the rains, other lakes, streams and rivers is collected in the lakes. This water is usually dirty and muddy. In the second stage, water from the man-made lakes is filtered in a special pond. Stones, sand and other unwanted tiny things are caught in it. After that, tiny microbes are still present in the water. These microbes are removed by "airing" the water and by adding a chemical substance called chlorine to the water. This kills all the microbes in the water. After this, the water can be safely used for drinking. The third stage is the distribution of the purified water to homes, hospitals, offices, factories and other places. This is done through a network of pipes of various sizes. These pipes must be made of a suitable material. Question: What is the purpose of adding chlorine to the water? Options: A: to air the water B: to catch tiny things C: to kill tiny microbes D: to remove harmful gases
C
(Question)
I'm taking a test and have to guess the right answer to the question after the article. Article: The world's earliest known fish hooks show that humans fished in the open sea for much longer than previously thought. Past studies have shown that early humans were able to cross the open ocean as far back as 50,000 years ago, but evidence that they could fish while in the open sea dated back only to 12,000 years ago. "In most areas of the world, evidence for our early ancestors' coastal exploitation was drowned by rising sea level," said researcher Sue O'Connor. Now O'Connor and her colleagues have found evidence of prehistoric fishing tools and the remains of large fish such as tuna at a cave shelter known as Jerimalai, located in the Southeast Asian island nation of East Timor. Their discovery uncovered fishing hooks made from bone that dated back to about 42,000 years ago. "It's possible that people caught the tuna in the deep channel that lies off the coast of the Jerimalai shelter," O'Connor said. The site, first uncovered in 2005, also included bone points, shell beads, the remains of fish, turtles, bats and birds, and nearly 10,000 stone tools. The island of Timor has very few land animals overall and only small birds call the island home, perhaps explaining why the ancient people here went fishing. About half the fish remains at the site came from fish such as tuna. Catching such fast-moving fish requires much planning and complex technology, suggesting that early humans developed these skills earlier than previously thought. Some other scientists might say that most of the fish bones seen are from young fish, and thus might have been caught more easily off the coast as opposed to in open waters. While this may be the case, it's still not easy to catch tuna -- it requires nets set in deep water. Question: According to Sue O'Connor, evidence for our early ancestors' coastal exploitation _ . Options: A: indicated tuna was a common dish for our early ancestors B: showed the trend of sea movement C: was difficult to find D: was buried in cave shelters
(Answer)
C
Ques: I'm taking a test and have to guess the right answer to the question after the article. Article: THERE are natural disasters that humans can predict. There are others whose timing is difficult to know. What happened in Indonesia last month fell into the latter group. On October 25, a tsunami caused by a 7.7 magnitude earthquake in the Mentawai islands of West Sumatra, Indonesia hit shores and damaged whole villages. By last Friday, it had left about 450 dead and forced around 15,000 people to leave their homes. Tsunami is Japanese for "harbor wave". It is usually caused by a sudden rise or fall of part of the Earth's crust under the ocean. It is most common in the Pacific and Indian oceans. Normally a tsunami is a series of waves. The waves can be very long - as much as 100 kilometers - and be as far as one hour apart. They are able to cross oceans without losing much energy. When the ocean is deep, tsunamis can travel unnoticed at speeds of up to 800 kilometers an hour. They can cross a whole ocean in a day or less. The wave may only be a few meters high but when they are near the shore and reach shallow water, they build up height very quickly. Some witnesses in the Mentawai islands reported seeing up to 6-meter high waves crash onto the shore. Failed alert system Many countries set up early warning systems in their waters in the hope of giving people enough time to escape to higher ground in the event of a tsunami. But Indonesia's warning system, completed with German aid, stopped working about a month ago because of disrepair , according to the country's Meteorology and Geophysics Agency. As a result, not a single siren sounded after the earthquake. However, it was unclear if the sirens could have made a difference because the islands affected were so close to the epicenter that the tsunami would have reached them within minutes. Question: According to the article, the tsunami that hit Indonesia _ . Options: A: caused many injuries but no deaths B: created huge waves when it hit the shore C: was caused by an earthquake deep in the sea D: traveled at a speed of 800 kilometers an hour
Ans: B
I'm taking a test and have to guess the right answer to the question after the article. Article: People who travel a lot fly with BA because they know they will get what they want and what they need. First of all, they want to go safely, and they also want to go quickly, across the country, across the sea, or right across the world -- and they know BA will take them where they want to go, when they want to go. BA flies all the newest and fastest planes, to more towns and cities, in more countries of the world, than any other airline. Do you want to go to Paris, Washington, or Beijing? BA will take you there, at all time of the day and night, right through the week. BA flies not only to the big cities, we also fly three or four times a week to towns and cities in the very heart of Asia, Africa and South America. People who travel a lot fly with BA, because they know that they will leave on time, and arrive on time. They know the food they will receive and the films they will watch will be of the very best. . When you fly, fly with BA. Question: BA flies to many big cities of the world _ . Options: A: every day B: every three days C: twice a week D: every other week
A