Urbanization

    Until relatively recently, the vast majority of human being lived and died without ever seeing a city. The first city was probably founded no more than 5,500 years ago. {#blank#}1{#/blank#} In fact, nearly everyone lived on farms or in tiny rural (乡村的) villages.

    It was not until the 20th century that Great Britain became the first urban society in history—a society in which the majority of people live in cities and do not farm for a living.

    Britain was only the beginning.

    {#blank#}2{#/blank#} The process of urbanization—the migration (迁徙) of people from the countryside to the city—was the result of modernization, which has rapidly transformed how people live and where they live.

    In 1900, fewer than 40% of Americans lived in urban areas. Today, over 82% of Americans live in cities. Only about 2% live on farms. {#blank#}3{#/blank#}

    Large cities were impossible until agriculture became industrialized. Even in advanced agricultural societies, it took about ninety-five people on farms to feed five people in cities. {#blank#}4{#/blank#}

    Until modern times, those living in cities were mainly the ruling elite ( 精英) and the servants, laborers and professionals who served them. Cities survived by taxing farmers and were limited in size by the amount of surplus（过剩）food that the rural population produced and by the ability to move this surplus from farm to city.

    Over the past two centuries, the Industrial Revolution has broken this balance between the city and the country. {#blank#}5{#/blank#}

    Today, instead of needing ninety-five farmers to feed five city people, one American farmer is able to feed more than a hundred non-farmers.

A.That kept cities very small.

B.The rest live in small towns.

C.The effects of urban living on people should be considered

D.Soon many other industrial nations became urban societies.

E.But even 200 years ago, only a few people could live in cities.

F.Modernization drew people to the cities and made farmers more productive.

G.Modern cities have destroyed social relations and the health of human beings.

    Swim-with-dolphins

    Humans have always been fascinated by dolphins and there has been a long history of association between the two.{#blank#}1{#/blank#}. The “swim-with-dolphins” tourist industry is becoming more popular every year. The chance to see dolphins in the wild is often a lifetime dream for many people and tour operators are always on the lookout to give their tourist swimmers the best experience they can. After all, it can cost a large amount of money to have this kind of holiday experience. {#blank#}2{#/blank#}

    Research has shown that while dolphins can move away if they do not want to interact with human swimmers, they do not like it at all if the swimmers slip into the water directly on top of them or if humans are in their path of travel. However, if swimmers enter the water to one side of them, the dolphins do not avoid the swimmers to the same extent.{#blank#}3{#/blank#}

    In all cases, the dolphins seem to have become more sensitive to the presence of the swimmers. For dolphins, swimming with humans is not necessarily a high priority(优先权). {#blank#}4{#/blank#} It is a new and unusual experience for them.

    {#blank#}5{#/blank#}The advice is that dolphins should be given adequate periods of time throughout the day when they are not exposed to tourism. Humans' lifelong dreams of swimming with dolphins in the wild have severely affected them, leaving not enough time for them to rest and take care of their own babies.

    If we are to enjoy these remarkable animals and not just use them for our entertainment, then we must carefully monitor the “swim-with-dolphins” industry worldwide.

A. They cannot fulfill their lifelong dreams.

B. This possibly seems like less threatening behavior to them.

C. In the long term there could be harmful effects on the dolphin's well-being.

D. It is frequently asked whether “swim-with-dolphins” tourism should be stopped.

E. So tour operators try to place eager swimmers as near as possible to the dolphins.

F. Over time this has turned into a worldwide tourist activity--swimming with dolphins.

G. In fact, only some baby dolphins will be relatively willing to participate in the interaction.

House Sitting

    In many countries of the world people do what is called house sitting. It means that if owners of the house are going away, they want someone to come into their home and look after the house and maybe pets while they are away.

    In Australia, many people travel. After people retire, they might buy a van and travel all over the country. {#blank#}1{#/blank#}

    So if someone wants to travel or go away for some reason, they might want someone in their home to care for it and keep the gardens tidy. House sitters might have to care for pets. Also, quite a few people have swimming pools in their back yard and they need cleaning. {#blank#}2{#/blank#} I feel it is a great way of seeing the country, because you go and stay in a new city, get to meet new people, and have time to go sightseeing in a new area.

    {#blank#}3{#/blank#} There are websites where you find the advertisements by people who want to travel, and by replying to the advertisement, you can make arrangements to go and look after their home. There are some requirements to be a house sitter. You must be a trusted person, so that the home owner knows you will not steal anything. You must be able to go when the house owner wants you to go, so you need lots of free time. {#blank#}4{#/blank#} You need to be good with pets, able to care for cats and dogs, or other pets they may have.

    Some house sitting Jobs are just for a few days or a couple of weeks while the house owner have a short holiday. Sometimes it is for much longer. We have had one house sit for six months, while the home owner travelled to Europe.

    {#blank#}5{#/blank#} Then you can travel to many different countries and stay there. One of the important things to get are references from the home owners where you have stayed. A reference is a written letter to say that you are trustworthy and have looked after their home well. You can show these letters to prospective house sitting Jobs and they know you will do a good job.

A. I have done house sitting many times.

B. Thousands of people do this all the time.

C. It is also possible to do house sitting in other countries.

D. Generally you have many opportunities to get a house sitting job.

E. You must take a little care over what your description says about you.

F. This is an international house sitting service for all city and country areas.

G. You must have a good car, so you can travel to different parts of the country.

Gardening 380 Kilometers above Earth

    Astronauts have to go through physical, psychological, and technical training. They also go through training in how to care for plants. These “astronaut gardeners” share their work and living space with plants.

    Taking seeds and plants along on a trip isn't a new idea. As space trips become longer, it will be necessary to grow food in space. {#blank#}1{#/blank#} Because of this, it's not practical to send everything needed for a long journey, only to be used once and thrown away.

    Plants can serve many uses on a space journey. They can provide more fresh things. {#blank#}2{#/blank#} Also, plants can help to make air quality better because they produce oxygen. They can improve the quality of the air inside the spacecraft—the only air the astronauts can breathe.

    {#blank#}3{#/blank#} Due to the lack of gravity in space, the oxygen that the plants produce stays around the plants. This can actually kill them, so fans are needed to circulate the air. Without gravity, roots don't “know” to grow down, leaves don't “know” to grow up, and water doesn't easily travel up the roots to the leaves. {#blank#}4{#/blank#} Besides, soil is too heavy to send to space, and special liquid gels (胶) are used to help plant growth.

    Scientists are also working on the plants themselves. They are trying to make plants grow more rapidly and grow with less water and light in space, and they are looking for ways to make plants more resistant to disease. {#blank#}5{#/blank#} Imagine that deserts may one day provide lots of fresh food for local people, saving transportation costs. Similarly, plants that are resistant to disease could provide an important food supply. With the world's population now at seven billion (十亿) people, our astronaut gardeners may help discover ways to feed those billions.

A. Every plant grown in space must have several uses.

B. However, there are challenges with growing plants in space.

C. Such methods may result in improvements back here on Earth.

D. The cost of taking anything into space is about $22,000 per kilogram.

E. Specialized containers are being developed to help the plants grow correctly.

F. Astronauts will welcome the addition of fruits and vegetables to their diet of dry foods.

G. Currently all oxygen is taken aboard in tanks and then caught again so it can be reused.

    After a long day at work, coming home is a breath of fresh air. Home is a comfortable place to sit back and relax. {#blank#}1{#/blank#}Below are a number of things we can do to create a healthy home environment that will help to ease the workday stress and promote our physical and mental health.

    {#blank#}2{#/blank#}It may seem like a tiring thing to clean but there is a reason for doing so. We can remove dust by cleaning the house. Leaving layers of dust everywhere means that there is a build-up of dust. And where do these layers of dust go? Into our lungs.

Making sure the rooms are full of sunlight is also important. We may not realize it but sunlight is an important part of our growth. We all know that sunlight promotes better working conditions. {#blank#}3{#/blank#}Think about using a Parans system where sunlight does not reach. This technology gathers the sunlight by using solar panels(板). It can send out sunlight wherever we are.

    It is also a good idea to add more plants in our house. {#blank#}4{#/blank#}They also give off oxygen, which can lower stress and improve our moods.

    Along the lines of being green, it can also be vital to think about what things we are bringing into the house. Try to avoid specific plastics that are harmful to health. {#blank#}5{#/blank#}They may contain poisonous chemicals that can be breathed in, or simply absorbed through the skin.

A. However, is it as healthy as it can be?

B. Is our home as comfortable as it used to be?

C. The same thing applies to certain carpets and paint

D. Going green will help to remove toxins(毒素) in the air.

E. Besides, it can reduce both stress and high blood pressure.

F. Cleaning the house regularly is the first thing we should do.

G. It is acknowledged that a greener lifestyle is linked to better health.

    Confidence is a skill that many folks want to master, but have a hard time acquiring. Have you ever wondered why? Possibly you were born confident. You were talked to negatively as a child or maybe you were rejected many times. Whatever the case is, {#blank#}1{#/blank#}.

    But how to boost your confidence?

    Act as if .Begin to act as if you are confident. Act as the person you would want to be like. {#blank#}2{#/blank#}. Surround yourself with people who you think are confident and have high value. You will learn so much from observing other confident folks.

    {#blank#}3{#/blank#}. One of the most areas that you need to pay attention to is your self-talk. Your thoughts about your capabilities and self-worth need to be positive and encouraging. Whenever you notice you think negatively, pause and take a moment, and shift your focus to something that can help you feel better about yourself.

    Go after your goals. If you are really serious about building self-confidence, you need to identify your goals and go after then. The more you add to your accomplishments, the more confident you will feel about your abilities and skills. {#blank#}4{#/blank#}.

    By using these steps to boost your confidence, {#blank#}5{#/blank#}.

A. Always stay positive

B. Improve your positive self-talk

C. Begin to think and behave like them

D. This requires you to know what a confident person looks like

E. you will be on the path to improving your self-esteem and self-worth

F. You'll begin to trust your inner self more and appreciate yourself more

G. you should know you can improve your self-esteem and build confidence