*Question*
I'm taking a test and have to guess the right answer to the question after the article. Article: When some plates of the earth move suddenly, an earthquake happens. Many earthquakes begin under the sea. Earthquakes may happen anywhere on the earth. They often happen near mountains. During an earthquake, the shakings make rocks rise suddenly and even crack open. Houses fall, people are killed and hurt, and sometimes whole villages or cities are destroyed. Can we do something to keep ourselves safe from earthquakes? Scientists have studied earthquakes and make maps that show "earthquake belts". In areas in these belts, it's possible for earthquakes to happen. In these areas we can build strong houses to fight against earthquakes. In the future, scientists will be able to predict exactly when and where an earthquake will happen. They can also tell people what to do with it. Question: It is said that many earthquakes happen _ . Options: A: on land B: in the sea C: at night D: next to mountains
**Answer**
D

*Question*
I'm taking a test and have to guess the right answer to the question after the article. Article: In our daily life now, you may often find some people like to do several things together at the same time. They may watch TV while playing cell phones, and they may work while chatting with their close friends. As a new research suggests, people who multitask all the time may be the worst at doing two things at once. The findings, based on performances and self-evaluations by about 300 college students, indicate that many people multitask not out of a desire to increase productivity, but because they are easily distracted and can't focus on one activity. And "those people turn out to be the worst at handling different things," said David Sandy, a psychologist at the University of Utah. Sandy and his colleagues gave the students a set of tests and asked them to report how often they multitasked, how good they thought they were at it, and how sensation-seeking or impulsive they were. They then evaluated the participants' multitasking ability with a tricky mental task that required the students to do simple mathematical calculations while remembering a set of letters. Not surprisingly, the scientists said, most people thought they were better than average at multitasking, and those who thought they were better at it were more likely to report using a cell phone while driving or viewing multiple kinds of media at once. But those who frequently deal with many things at the same time were found to perform the worst at the actual multitasking test. They also were more likely to admit to sensation-seeking and impulsive behavior, which connects with how easily people get bored and distracted. "People multitask not because it's going to lead to greater productivity, but because they're distractible, and they get sucked into things that are not as important," Sandy said. Adam, a researcher at the University of California, who was not a member of the research group, said one limitation of the study was that it couldn't find out whether people who start out less focused tend toward multitasking or whether people's... Question: When Sandy and his colleagues conducted their research, they _ . Options: A: evaluated the academic achievements of the students B: measured the changes of the students' understanding ability C: assessed the multitasking ability of the students D: analyzed the effects of the participants' tricky mental tasks
**Answer**
C

*Question*
I'm taking a test and have to guess the right answer to the question after the article. Article: There is just one four-legged animal that can walk two hundred miles without stopping once to rest. It would take a person two days and two nights to walk this far, and only one man has ever done it without stopping. What amazing animal has such endurance ? The camel! The camel is well known for something else, too. It can cross an entire desert without a single drink of water. Its body is built in a special way to help it store water and food. A person has just one stomach, but a camel has quite a few. Within each stomach are layers and layers of cells. These cells are like tiny water balloons, storing liquids until the camel needs them. When the camel drinks, the cells grow larger and larger. For a whole week, they can keep the animal's thirst away by sending water to all parts of its body. Have you ever wondered why the camel has a hump ? The hump is a storage place for fat. Because it has this storage area, the camel does not need to eat very often. When the animal needs energy, the layers of fat serve as fuel to keep it going on the long, hot days in the burning sun. The camel has another gift that makes it well suited to arid regions. This gift is its amazing nose. A camel can smell a water hole from miles away! When a camel moves, it sways from side to side like a ship on a wavy ocean. Because of this swaying motion, the camel has been called the "ship of the desert". Question: Why has the camel been called the "ship of the desert"? Options: A: The desert is like a sea. B: The camel can cross the desert just like a ship. C: The movement of the camel is just like a ship traveling on an ocean. D: The shape of the camel is like that of a ship.
**Answer**
C

*Question*
I'm taking a test and have to guess the right answer to the question after the article. Article: Caffeine not only gives us a daily jump start, but new research suggests it also can strengthen long-term memory. According to the US Food and Drug Administration, nearly 90 percent of people worldwide consume about 200 milligrams of caffeine each day. That' s equivalent to about one strong cup of coffee a day. Writing in " Nature Neuroscience" , Johns Hopkins University researchers say their findings show that caffeine strengthens certain memories for up t0 24 hours after being taken in. " We've always known that caffeine has cognitive-enhancing effects , but its ,particular effects on strengthening memories and making them resistant to forgetting has never been examined in detail in humans, " said senior author of the paper Michael Yassa. " We re- port for the first time a specific effect of caffeine on reducing forgetting over 24 hours. " Conducting a double-blind trial, the researchers worked with a test group of people who didn't regularly consume caffeinated products. Five minutes after studying a series of images, the test subjects were given either a placebo or a 200-milligram caffeine tablet. To check the caffeine levels of their test subjects, the research team took saliva samples from them before they took their tablets and again one, three and 24 hours after- wards. Both groups of test participants ( those who took the placebo and those who took the caffeine tablet) were tested the following day to see if they could recognize the images they' d seen the previous day. The test included showing the test subjects another series of images that included some new images , those that were shown the previous day, as well as other images that were similar, but not the same as those they had viewed earlier. The researchers found that more members of the group who were given the caffeine tablets were able to correctly identify some of the new images as " similar" to previously viewed images rather than incorrectly identifying them as the same. "We also know that caffeine is associated with... Question: During the research ,the researchers did the following things EXCEPT Options: A: giving the test subjects placebos or caffeine tablets B: checking the caffeine levels of the test subjects C: encouraging the test subjects to drink more coffee D: showing the test subjects series of images
**Answer**
C