Read the following article and answer the question. Article: Scientists study the ocean in many different ways. Although many marine scientists focus on animals in the ocean, others seek to gain a better understanding of the ocean's chemical and physical components . Scientists are learning a great deal about the natural and human-caused processes that shape the ocean and its many life forms. Much of the present research focuses on how human activity influences the ocean. Clean water is a limited resource, and ocean pollution does harm to plant and animal health. Some scientists are now studying ocean water to find out just how contaminated it is. Scientists are also working on new methods to estimate the presence of poisons in the ocean, which will help them develop better techniques for cleaning up the water. Others look at how sea living things get used to poisons because poisonous sea life has an effect on humans too. For example, some seafood is poisoned, which may cause a threat to humans who eat it. Another type of marine scientist tries to learn more about the history of the ocean. Understanding the ocean's past tells scientists more about its patterns and cycles today and in the future. The ocean's past, which is recorded by deposits in the ocean floor, helps scientists understand such important matters as global climate change and other environmental differences. The more researchers learn about the history of the ocean and its relation to climatic and environmental changes, the more likely that they will one day understand what causes such changes. Other scientists are concerned with understanding how ocean systems work. The word systems refers to all the conditions and elements that are continually changing the ocean. Understanding these systems is necessary to protect the ocean and ensure the safety of its life forms. The cycles of ocean life also have an enormous effect on human life; for example, studying coastal waters is important because they provide much of the fish that humans eat. Marine geologists are earth scientists who work along the ocean... Question: We know from the passage that ocean waters are important to human life because they _ . Answer:
OPTIONS:
- mirror the history of the mighty ocean
- show climatic and environmental changes
- are source of the fish people consume
- are the evidence of the changes of the ocean
are source of the fish people consume

Read the following article and answer the question. Article: My sisters and I have dreamt of a home in the city, but when the Alcott family found itself in a small house at the South End without a tree in sight, only a back yard to play in, and no money to buy any of the beautiful things before us, we children all opposed it and longed for the country again. Anna soon found little pupils, and walked away each morning to her daily task, pausing at the corner to wave her hand to me in answer to my greet with the duster . My father went to his office downtown, mother to her helping the poor, the little girls to school, and I, Lousia, was left to keep house, feeling like an aged sea-gull as I washed dishes and cooked in the basement kitchen where the only thing I could hope for was someone talking with me. Good drill, but very hard, and my only comfort was the evening reunion where all met with such various reports of the day's adventures, we could not fail to find both amusement and instruction. Father brought interesting and attractive news from the upper world; mother, usually in low spirits because she would give away her clothes with sad tales of suffering from the darker side of life; gentle Anna gave a modest account of her success as a teacher, for even at seventeen her sweet nature won all who knew her, and her patience gained her the support of the most naughty pupil. My reports were usually a mixture of sadness and happiness, and the children poured their small joys and troubles into the family where comfort and mercy were always to be found. Question: We know from this passage that the Alcott family was _ . Answer:
OPTIONS:
- a happy and united family
- an extremely poor family
- a family with lots of serious problems
- a family that remained in the country

Answer: a happy and united family

Question: Read the following article and answer the question. Article: The Mississippi is the major river system in the United States. The Yangtze is China's longest river. Although a world apart, the two waterways share conservation concerns that provide a cultural bridge between students in the United States and China, as well as from around the world. The Mississippi flows almost 3,800 kilometers from a small lake in Minnesota, gathering the waters of 250 other rivers and streams before reaching the Gulf of Mexico. In mid-May, as spring flowers began to open, about 41 students from a dozen colleges, mostly in the Midwest, explored a section of the river in Wisconsin and Iowa, to learn about the environment, and each other. The students, from the U.S., China and around the world, came to join the River Spirit Exchange program. The cross-cultural educational experience - set up by the University of Wisconsin, Madison-based Environment and Public Health Network for Chinese Students - focuses on the Mississippi and China's longest river, the Yangtze. This three day get-together featured story-telling, hiking, camping and canoeing, all part of a larger lesson about conservation projects that can be used on both the Yangtze and Mississippi. While the students learned about the problems challenging the Mississippi and Yangtze, Jeb Barzen, a wildlife biologist, explained they should also learn about the importance of bridging each other's culture. The president of the Environment and Public Health Network for Chinese Students, Xiaojun Lu, said the Mississippi and Yangtze Rivers are uniting these students from opposite ends of the earth. Organizers say the success and spirit of this first gathering of students will lead to other trips, including one down the Yangtze. Question: According to the passage, the get-together _ . Answer:
OPTIONS:
- lasted a week
- took place in May
- was held in China
- was organized by students
Answer: took place in May

Read the following article and answer the question. Article: We all know that the normal human daily cycle of activity is of some 7-8 hours' sleep alternating with some 16-17 hours' wakefulness and that the sleep normally coincides with the hours of darkness. Our present concern is with how easily and to what extent this cycle can be modified. The question is no mere academic one. The ease, for example, with which people can change from working in the day to working at night is a question of growing importance in industry where automation calls for round-the-clock working of machines. It normally takes from five days to one week for a person to adapt to a reversed routine of sleep and wakefulness, sleeping during the day and working at night. Unfortunately, it is often the case in industry that shifts are changed every week; a person may work from 12 midnight to 8 a.m. one week, 8 a.m. to 4 p.m. the next, and 4 p.m. to 12 midnight the third and so on. This means that no sooner has he got used to one routine than he has to change to another, so that much of his time is spent neither working nor sleeping very efficiently. The only real solution appears to be to hand over the night shift to a number of permanent night workers. An interesting study of the domestic life and health of night-shift workers was carried out by Brown in 1957. She found a high incidence of disturbed sleep and other disorders among those on alternating day and night shifts, but no abnormal occurrence of these phenomena among those on permanent night work. This latter system then appears to be the best long-term policy, but meanwhile something may be done to relieve the pressure of alternate day and night work by selecting those people who can adapt most quickly to the changes of routine. One way of knowing when a person has adapted is by measuring his body temperature. People occupied in normal daytime work will have a high temperature during the hours of wakefulness and a low one at night; when they change to night work the pattern will only gradually go back to match the new routine and the... Question: Which of the following statements is NOT TRUE? Answer:
OPTIONS:
- Body temperature may serve as an indication of a worker's performance.
- The selection of a number of permanent night shift workers has proved to be the best solution to problems of the round-the- clock working system.
- Taking body temperature at regular intervals can show how a person adapts to the changes of routine.
- Disturbed sleep occurs less frequently among those on permanent night or day shifts.
The selection of a number of permanent night shift workers has proved to be the best solution to problems of the round-the- clock working system.