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Read the following passage and mark the letter A, B, C, or D on your answer sheet te indicate the correct answer to each of the questions from 31 to 35. The walnut tree produces wood that is used for countless purposes, and is considered the finest wood in the world. The wood is easy to work with, yet it is very hard and durable and when it is polished, it produces a rich, dark luster. It also shrinks and swells less than any other wood, which makes it especially desirable for fine furniture, flooring, and even gun stocks. In fact, just about every part of the walnut is unusually hard and strong. The nut of the tree is encased inside a very hard shell, which itself is enclosed in a leathery outer covering called a husk. It requires real effort to break through those layers to get at the tasty meat inside. Yet every part of the walnut is useful to people. The outer husk produces a dark reddish stain that is hard to remove from the hands of the person who opens the nut, and this pigment is widely used in dyes and wood stains. The inner shell is used as an abrasivesubstance to clean jet engines. And the meat of the nut is extensively used in cooking, ice cream, flavorings-and just eaten raw. Walnut trees exudea chemical into the soil near their roots which can be poisonous to some trees and shrubs. Fruit trees, for example, will not survive if planted too close to a walnut. Many other plants, such as maple trees or ivy, are not affected by the walnut's presence, and are well-suited to grow in its vicinity. Câu 31: What is the topic of this passage?

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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 26 to 30. Books are essential to learning as they (26) _____________ unlimited information to the readers. If you want to know about dogs, you can easily learn about dog behavior, breeds, caring, and various topics about our canine friends by reading books. You don't have to go to school just to gather quick information about a subject. (27) _____________you need to do is grab a book, read, and absorb the contents. People who are in need of data can acquire them from books. It is not necessary to attend school in order to get information. A quick scan on books will give you the details, facts, and data that you need about a topiC. Books are actually one of the best sources of information. One of the main reasons why they are (28) _____________as top sources of knowledge is because they provide unlimited facts to the readers. If you do a research, you can definitely find (29) _____________you are looking for from books. This is why we often turn to books or any reading materials whenever we have a research about a project. Whether you are a student or a professional, you will definitely gain something new whenever you open a page of a book. Before the invention of laptops and iPads, books were known as the ultimate source of information. Unlike the internet, you can bring any book you want with you anywhere you go. (30) _____________, they don't take up much space in your bag. You can easily carry them when you go out on a trip or while traveling to school.

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Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 42. Any rock that has cooled and solidified from a molten state is an igneous rock. Therefore, if the Earth began as a superheated sphere in space, all the rocks making up its crust may well have been igneous and thus the ancestors of all other rocks. Even today, approximately 95 percent of the entire crust is igneous. Periodically, molten material wells out of the Earth's interior to invade the surface layers or to flow onto the surface itself. This material cools into a wide variety of igneous rocks. In the molten state, it is called magma as it pushes into the crust and lava when it runs out onto the surface. All magma consists basically of a variety of silicate minerals (high in silicon-oxygen compounds), but the chemical composition of any given flow may differ radically from that of any other. The resulting igneous rocks will reflect these differences. Igneous rocks also vary in texture as well as chemistry. Granite, for instance, is a coarse-grained igneous rock whose individual mineral crystals have formed to a size easily seen by the naked eye. A slow rate of cooling has allowed the crystals to reach this size. Normally, slow cooling occurs when the crust is invaded by magma that remains buried well below the surface. Granite may be found on the surface of the contemporarylandscape, but from its coarse texture we know that it must have formed through slow cooling at a great depth and later been laid bare by erosion. Igneous rocks with this coarse-grained texture that formed at depth are called plutonic. On the other hand, if the same magma flows onto the surface and is quickly cooled by the atmosphere, the resulting rock will be fine-grained and appear quite different from granite, although the chemical composition will be identical. This kind of rock is called rhyolite. The most finelygrained igneous rock is volcanic glass or obsidian, which has no crystals. Some researchers believe this is because of rapid cooling; others believe it is because of a lack of water vapor and other gases in the lava. The black obsidian cliffs of Yellowstone National Park are the result of a lava flow of basalt running head on into a glacier. Some of the glacier melted on contact, but suddenly there also appeared a huge black mass of glassy stone. Câu 36. In the first paragraph, the author mentions that _____________.

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