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Have you ever noticed that our machines are getting smaller? Cell phones, cameras, computers and everything else look smaller every year. One kind of new science involves machines that are smaller than we can imagine. The name of this science is nanotechnology. Nanotechnology means doing science, engineering, and technology at a very very small level. In other words, nanotechnology is the science of tiny things. But how tiny is the science of nanotechnology? In nanotechnology, scientists work with things that are the size of a nanometer. One meter has one billion nanometers. Here is another way to describe nanotechnology: it is the science of observing and controlling individual atoms and molecules. Nanotechnology is a new word, but the idea of studying atoms and molecules has existed for a long time. In 1959, an American scientist Richard Phillips Feynman gave a speech in which he claimed that we can see and control molecules and atoms. About ten years later, a Japanese professor came up with the term “nanotechnology”. Because nanotechnology is so new, we are only starting to understand how we can use it. Nanotechnology could be very useful in medicine. In the future, doctors may use nanotechnology to help with organ transplants. An organ transplant is the act of putting an organ into another person’s body. Scientists think that with nanotechnology, they might be able to make a person’s body accept a foreign organ. Nanotechnology might also help doctors fight infections, find diseases in patients, and deliver medicine to the right spot in patients’ bodies. Nanotechnology might also be useful in protecting the environment. It might be able to help us save energy, reduce waste, and keep water clean. For example, nanotechnology might be able to make some materials such as steel stronger. If we have stronger steel, we will be able to use it longer. That way, we can produce less steel and save our resources. Nanotechnology might be useful in so many ways. This science of studying tiny things could change the world.
5. According to the passage, what will nanotechnology NOT do?

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Who has ..................... apples in all of us?

Find the word which has a different sound in the part underlined

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The sports ____________ lasted for 2 weeks in London.

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Any change in one part of an ecosystem can cause changes in other parts. Droughts, storms and fires can change ecosystems. Some changes (1) _______ ecosystems. If there is too (2)_____ rainfall, plants will not have enough water to live. If a kind of plant dies off, the animals that feed on it may also die or move away. Some changes are good for ecosystems. Some pine forests need fires for he pine trees to reproduce. The seeds are sealed inside pinecones. Heat from a forest fire melts the seal and lets the seeds (3) _______. Polluting the air, soil, and water can harm ecosystems. Building (4) _______ on rivers for electric power and irrigation can harm ecosystems around the rivers. Bulldozing wetlands and cutting down forests destroy ecosystems. Ecologists are working with companies and governments to find better ways of (5) _______ fish, cutting down trees, and building dams. They are looking for ways to get food, lumber, and other products for people without causing harm to ecosystems.

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The oceans of the world are precious because of (1)_________ they do for all life on the Earth. They help regulate the temperature of the planet and they are home to a myriad of sea creatures – many of which we depend on (2)________ sources of food. However, due to our consumption and improper disposal of plastic items, human beings have created a swirling mess of garbage. The one located in the Pacific now known as the Great Pacific Garbage Patch, and it is not a pretty sight. In an ideal world, all of the plastic would be recycled and there would be zero waste. This is not the case, however, and a huge amount of the plastic ends up making its (3)_________ to our oceans due to carelessness. (4)__________ the plastic is part of rain runoff coming from a landfill or just a thoughtless discard of a piece of plastic onto the ground, if it ends up in the Pacific Ocean, it will eventually become part of the disgusting patch of garbage. The Great Pacific Garbage Patch may be impossible to (5)__________ but it is doing a lot of harm to sea life. If anything, we can do our best to avoid over-using plastic

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Scientists have developed a new bionic computer chip that can be mated with human cells to combat disease. The tiny device, smaller and thinner than a strand of hair, combines a healthy human cell with an electronic circuitry chip. Doctors can control the activity of the cell by controlling the chip with a computer.
It has long been established that cell members become permeable when exposed to electrical impulses. Researchers have conducted genetic research for years with a trial-and-error process of bombarding cells with electricity in an attempt to introduce foreign substances such as new drug treatments or genetic material. They were unable to apply a particular level of voltage for a particular purpose. With the new invention, the computer sends electrical impulses to the chip, which triggers the physicians to open a cell‘s pores with control.
Researchers hope that eventually they will be able to develop more advanced chips whereby they can choose a particular voltage to activate particular tissues, whether they be muscle, bone, brain, or others. They believe that they will be able to implant multiple chips into a person to deal with one problem or more than one problem.

The author states that scientists previously were aware that     .

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A Healthy Way To Know A City
Maybe you are staying in a city, and there is no park nearby where you can take your morning job. One of the more recent trend is to go on a running tour, but you are not leading the way. Rather, a running (1)_________ who knows the best (2)_________ in the city acts as your guide. You are going out for a run, but you are also being shown highlights of the city while you are doing it. Guided running tours are a trend that seems to be catching (3)_________ in quite a few of the bigger cities in the United States. New York City, Chicago,  and San Francisco are just three of the major cities that have running tours in (4)_________. They offer these tours to individuals, groups, and even for corporate events. If you are going into a city with colleagues to attend a business meeting or a convention, what better way is there to see the city and network with others (5)_________ while taking a healthy run?

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What is your ……… subject at school?

Frank’s wallet is lying on the coffee table. He _____ it here last night.

(371)_________

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The group leader prevented his members _______.

He has been very interested in doing research on _____ since he was at high school.

(185)____

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The American type of football was developed in the 19th century from soccer and rugby football. Played by professionals, amateurs, college and high school students, or young children, football in American is one of the most popular sports besides basketball and baseball. It attracts millions of fans each fall and people are very supportive of their favourite teams. The football playing field of today is rectangular in shape and measures 100 yards long and 53.5 yards wide. White lines are painted on the playing field to mark off the distances to the end zone. The games is divided into four quarters, each fifteen minutes long. The first two quarters are known as the first half. There is a rest period between two halves which usually last about fifteen minutes. Each team has eleven players. Each team has offensive players who play when the team has possession of the ball and defensive players who play when the other team has the possession of the ball. Because of the body contact players have during the game, helmets are worn to protect their head and face area, whereas pads are worn to protect the shoulders, arms, and legs. Also, there are officials carrying whistles and flags to make certain that the rules of the game are followed during the game. The football is made of leather and is brown in colour. It is shaped much like an oval and has white rings near each end of the football. These rings help the players see the ball when it is thrown or someone is running with it. The eight stitches on the top of the football help the players to grip the ball when throwing or passing. The most famous game of the year is Super Bowl that is played in January or February. It is televised around the world and is watched by millions of people each year.

Which is the most popular sport in the US?

Any change in one part of an ecosystem can cause changes in other parts. Droughts, storms and fires can change ecosystems. Some changes harm ecosystems. If there is too (1)____ rainfall, plants will not have enough water to live. If a kind of plant dies off, the animals that feed on it may also die or move away. Some changes are good for ecosystems. Some pine forests need fire for the pine trees to reproduce. The seeds are sealed inside pinecones. Heat from a forest fire melts the seal and lets the seeds (2)_____. Polluting the air, soil, and water can harm ecosystems. Building (3)_______ on rivers for electric power and irrigation can harm ecosystems around the rivers. Bulldozing wetlands and cutting down (4)________ destroy ecosystems. Ecologists are working with companies and governments to find better ways of catching fish, cutting down trees, and building dams. They are looking for ways to get food, lumber, and other products for people (5)________ causing harm to ecosystems

(62)_________

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The Most Convenient Way to Shop
Do you do a lot of online shopping? For millions of people, it is a wonderful way to purchase the things they want without having to leave their homes. Online shopping is not very old. The first online shopping company was created in 1991. However, the idea of shopping from home has existed for a very long time. Many years ago, people shopped with mail-order catalogues. A catalogue is a very thin magazine that is full of advertisements, and then they mailed their order back to the company. A few weeks later, their product arrived. Because people ordered their products through the mail, they were called “mail-order” catalogues. After that, shopping television shows became popular. These TV shows introduced products to people watching at home. People who wanted to buy something called the company and placed the order. This is called home shopping. Now we have online shopping. Online shoppers go online and look at web sites. When they find something they want, they place an order with the web site. They usually pay with a credit card or with virtual currency. Online shopping is changing shopping. Millions of people buy things online every day. The biggest effect of online shopping is on stores. As more people buy things online, more stores are shutting down. After all, why should you go to a store if you can buy things from home? The main advantage of online shopping is convenience. You can buy almost anything from anywhere in the world, and a week later the product will be in your house. Also, other customers write reviews of products. You can read these reviews and decide whether or not you want to buy the product. The big disadvantages are the loss of jobs from store closing, and the fact that you can’t examine an item closely before you buy it. After online shopping, what do you think will come next?
1. Which of the following came first?

Mark the letter A, B, C, or D on your answer sheet to indicate the undelined part that needs correction in each of the following questions:
The mineral particles found in soil range in size from microscopic clay particles to large boulders. The most abundant particles - sand, silt, and clay - are the focus of examination in studies of soil texture. Texture is the term used to describe the line composite sizes of particles in a soil sample, typically several representative handfuls. To measure soil texture, the sand, silt, and clay particles are sorted out by size and weight. The weights of each size are then expressed as a percentage of the sample weight.
In the field, soil texture can be estimated by extracting a handful of sod and squeezing the damp soil into three basic shapes; cast, a lump formed by squeezing a sample in a clenched fist; thread, a pencil shape formed by rolling soil between the palms; and ribbon, a flatfish shape formed by squeezing a small sample between the thumb and index finger. The behavioral characteristics of the soil when molded into each of these shapes, if they can be formed at all, provides the basis for a general textural classification. The behavior of the soil in the hand test is determined by the amount of clay in the sample. Clay particles are highly cohesive, and when dampened, behave as a plastic. Therefore the higher the clay content in a sample, the more refined and durable the shapes into which it can be molded.
Another method of determining soil texture involves the use of devices called sediment sieves, screens built with a specified mesh size. When the soil is filtered through a group of sieves, each with a different mesh size, the particles become grouped in corresponding size categories. Each category can be weighed to make a textural determination. Although sieves work well for silt, sand, and larger particles, they are not appropriate for clay particles. Clay is far too small to sieve accurately; therefore, in soils with a high proportion of clay, the fine particles are measured on the basis of their settling velocity when suspended in water. Since clays settle so slowly, they
are easily segregated from sand and silt. The water can be drawn off and evaporated, leaving a residue of clay, which can be weighed.

The word “they” in the passage refers to     .

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Fashion ___________want to change the traditional ao dai.

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People have five senses. We have a sense of sight, hearing, smell, touch, and taste. Believe (1)_________, your sense of smell is very important. Our nose tells us about our environment. When your nose smells something, it sends information to our brain. Smells tell us if there is danger nearby, or if there is something to eat. Of course, these tools were more useful in the past, but they still come (2)_________ today. The things you smell can affect your (3)________. If you smell something nice, you are more likely to be happy. On the other hand, if you smell something unpleasant, you are more likely to be unhappy. That is (4)_________ there are many businesses that work to create nice scents. Businesses also work on the ways to deliver scents to people’s noses. Candles (5)_________ a whole room smell better. Oils and soaps also have health benefits.

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The weather was fine so we decided to go ____________ foot

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The ____________ will announce tomorrow’s weather on TV at 7:30 tonight.

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Recent technological advances in manned and unmanned vehicles, along with breakthroughs in satellite technology and computer equipment, have overcome some of the limitations of divers and diving equipment for scientists doing research on the great oceans of the world. Without a vehicle, divers often became sluggish, and their mental concentration was severely limited. Because undersea pressure affects their speech organs, communication among divers has always been difficult or impossible. But today, most oceanographers avoid the use of vulnerable human divers, preferring to reduce the risk to human life and make direct observations by means of instruments that are lowered into the ocean, from samples take from the water, or from photographs made by orbiting satellites. Direct observations of the ocean floor can be made not only by divers but also by deep-diving submarines in the water and even by the technology of sophisticated aerial photography from vantage points above the surface of more than seven miles and cruise at depths of fifteen thousand feet. In addition, radio-equipped buoys can be operated by remote control in order to transmit information back to land-based laboratories via satellite. Particularly important for ocean study are data about water temperature, currents, and weather. Satellite photographs can show the distribution of sea ice, oil slicks, and cloud formations over the ocean. Maps created from satellite pictures can represent the temperature and the color of the ocean's surface, enabling researchers to study the ocean currents from laboratories on dry land. Furthermore, computers help oceanographers to collect, organize, and analyze data from submarines and satellites. By creating a model of the ocean's movement and characteristics, scientists can predict the patterns and possible effects of the ocean on the environment.
Recently, many oceanographers have been relying more on satellites and computers than on research ships or even submarine vehicles because they can supply a greater range of information more quickly and more effectively. Some of humankind's most serious problems, especially those concerning energy and food, may be solved with the help of observations made possible by this new technology.

How is a radio-quipped buoy operated?