Question: Read the article and select the best answer. 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 _ . Options: A: mirror the history of the mighty ocean B: show climatic and environmental changes C: are source of the fish people consume D: are the evidence of the changes of the ocean
Answer: C

Question: Read the article and select the best answer. Article: On June 15th,2012,millions of people watched as 33yearold Nik Wallenda walked across one of the world's greatest waterfalls on a tightrope .What made the 25-minute walk that was televised live and watched by over 13 million people worldwide even more amazing,is that it was done over the Niagara Falls-An action that had never been attempted before. Even though Nik was wearing a harness ,a safety measure provided by ABC,the television network that broadcast the event,his action to keep his balance against the strong winds made for some heart-stopping moments for the audience. Nik,however,never slowed down for even one moment.Wearing special shoes made by his mother,he remained totally focused on the job at hand.It was only when he got to the last stretch near Canada's Table Rock that he knelt down on one knee and finally broke into a smile.Waving and blowing kisses to the cheering audience,he knew he had accomplished a great task,which most people had thought impossible. While he described the whole experience as peaceful and relaxing,Nik said his biggest challenges came from a totally unexpected source-his 40 pound balancing pole.The balancing pole was so heavy that he could hardly carry it on the tightrope. One would think that now that Nik has realized his lifelong dream he would be ready to hang up his "balancing pole".However,the adventurer who already has seven Guinness World Records under his belt,is just getting started-Next up? A 5,000-foot tightrope walk across the Grand Canyon.While the one across the Niagara Falls took years of planning because he had to convince the US and Canadian officials,this one should happen in the very near future.That's because,the Florida resident has already been granted a permit by the Canyon officials.5 Question: What was the greatest difficulty for him to face in Nik view? Options: A: The supplied tightrope. B: The safety belt. C: The balancing pole. D: The audience's noise.
Answer: C

Question: Read the article and select the best answer. Article: Life affects friendships. As we grow, marry, fight in wars, move across the country or change jobs, old friendships fall away and new ones form. As long as we live, the things around us change, and as long as things change, friendships are affected. When we were children we had best friends. No matter what happened we were still friends. We live our lives, however, and do what life calls for us to do, and as we get older, memories fade, faces blur, and even friends' names from childhood are forgotten. Do you have a question about friendship? Do you wonder what to do with a friend who is no longer friendly? Perhaps you will see that you can't control others. If someone wants to be your friend, it is their choice. All you can do is treat them well and do the best for them when you are with them. Then you wish them well when they leave. You can talk to old timers and they will tell you that life is full of incredible joy and incredible sorrow, and that what bothers you today will one day becomes a memory and the sting will be gone. Seniors might tell you that you will learn more as you get older. They will tell you that friendships come and friendships go. Sometimes when they go it will hurt, but you will be okay with it. It's the way life works, after all. Question: The text mainly tell us _ . Options: A: how to face the changes in friendship B: how to deal with unfriendly people C: that childhood friendship is valuable D: how to share happiness with friends
Answer:
A