When you go to the doctor, you like to come away with a prescription．It makes you feel better to know you will get some medicine. But the doctor knows that medicine is not always needed. Sometimes all a sick person needs is some reassurance that all will be well. In such cases the doctor may prescribe a placebo.

    A placebo is a sugar pill, a harmless shot, or ail empty capsule. Even though they have no medicine in them, these things seem to make people well. The patient thinks it is medicine and begins to get better. How does this happen?

    The study of the placebo opens up new knowledge about the way the human body can heal itself. It is as if there was a doctor in each of us. The doctor will heal the body for us if we let it. But it is not yet known just how the placebo works to heal the body. Some people say it works because the human mind fools itself. These people say that if the mind is fooled into thinking it got medicine, then it will act as if it did, and the body will feel better.

    Placebos do not always work. The success of this treatment seems to rest a lot with the relationship between the patient and the doctor. If the patient has a lot of trust in the doctor and if the doctor really wants to help the patient, then the placebo is more likely to work. So in a way, the doctor is the most powerful placebo of all.

    A placebo can also have bad effects. If patients expect a bad reaction to medicine, then they will also show a bad reaction to the placebo. This would seem to show that a lot of how you react to medicine is in your mind rather than in your body. Some doctors still think that if the placebo can have bad effects it should never be used. They think there is still not enough known about it.

    The strange power of the placebo does seem to suggest that the human mind is stronger than we think it is. There are people who say you can heal your body by using your mind. And the interesting thing is that even people who swear this is not possible have been healed by a placebo．

Integrity

    Integrity is the quality of being honest and strong about what you believe to be right. The concept of integrity has played a key role in moral philosophy throughout history and is promoted in all societies because of its importance to social relations. Individual integrity is vital to society, one that enables people to make use of their capacity for critical reflection, does not force people to take up particular roles and does not encourage individuals to betray each other. Besides, societies can be favorable to the development of individual integrity.

    Individual integrity can lift up the spirits of the entire society. It can shape the lives of people living in a particular society, the lives of all fellow people and, in its broadest sense, even the destiny(命运) of a nation. By contrast, if those living in the society are corrupt, it could have bad effects, jeopardizing the healthy morality of the society.

    On the other hand, a society can be favorable to the development of individual integrity. Society expects and requires integrity. A society consisting of people of integrity, and people who never compromise on their principles, could have a positive mark on the personal development of its members. Being a part of such a morally lively community could serve as a basis for absorbing traits of good character. This could be of a distinct advantage to any individuals in the society.

    However, some social structures are of the wrong sort for some individuals to pursue(追求) integrity. If that is the case, we have to ask questions about the moral nature of society first before raising questions about individual integrity. Questions about integrity may turn out to be about what kind of society it is, rather than about the relationship between individual interests and characteristics of a society. The pursuit of adequate individual integrity often depends, not so much on understanding who one is and what one believes and is committed to, but rather understanding what one's society is and imagining what it could be.

    Under no circumstances can we underestimate the importance of human integrity in a society. People, who are honest, trustworthy, compassionate and caring, are the factors decisive in the growth of individuals as well as the development of a society.

阅读下列短文，从每题所给的四个选项（A、B、C和D）中，选出最佳选项。

    If the crust (外壳) of the earth were not pretty solid (坚固的), it would be shaking about and moving up and down frequently. However, there are places in the rocks of the earth's crust where it isn't strongly held together—where faults exist. Along the faults, one rock might push against another with great force. The energy is changed to vibration in the rocks, so they begin to shake and we have an earthquake!

    The most famous one in North America was the San Francisco earthquake of 1906. Seven hundred people died and property (财产) damage amounted to about $425,000,000.The greatest destruction came from the fires that followed the quake.

    One of the most famous earthquakes in Europe took place in Lisbon, Portugal, in 1755. The city was destroyed and at least thirty thousand people were killed. In 1908, in Calabria and Sicily, a quake killed about seventy­five thousand people. In 1915, in central Italy, hundreds of towns and villages were damaged and thirty thousand people were killed.

    Two great earthquakes that caused great damage in Asia took place in Tokyo, Japan, and in Gansu Province in China. The Tokyo quake of 1923 killed more than one hundred thousand people and destroyed the city and the city of Yokohama, too. The Chinese quake in 1920 covered more than three hundred square miles and killed about two hundred thousand people.

    The sixth mass extinction of life on the Earth is unfolding more quickly than feared, scientists have warned. More than 30 percent of animals with a backbone — fish, birds, amphibians, reptiles and mammals — are declining in both range and population, according to the first comprehensive analysis of these trends.

    Around a decade ago, experts feared that a new range wipeout of species was appearing. Today, most agree that it is underway — but the new study suggests that the die-out is already growing fast.

    The loss of biodiversity has recently accelerated. Several species of mammals that were relatively safe one or two decades ago are now endangered, including cheetahs, lions and giraffes, the study showed.

    There is no mystery as to why: our own ever-expanding species — which has more than doubled in number since 1960 to 7.4 billion — is eating, crowding and polluting its planetary cohabitants out of existence. By comparison, there are as few as 20,000 lions left in the wild, less than 7,000 cheetahs, 500 to 1,000 giant pandas.

    The main drivers of wildlife decline are habitat loss, over-consumption, pollution, other species, disease, as well as hunting in the case of tigers, elephants, rhinos and other large animals prized for their body parts.

    Climate change is thought to become a major threat in the coming decades, with some animals — most famously polar bears — already in decline due to rising temperatures and changing weather patterns.

    Venus, the Wildest Adventure in 3016!

    A trip to the moon, to Mars? You are out. Venus (金星) is your choice! Our spaceship carries you there at the speed of light!

    Amazing Venus Facts

    Temperature range: ALWAYS about 450 degrees Celsius. Great for barbecues!

    Seasons: No seasons. Always visit during best season!

    Gravity strength: 0.91 of Earth's gravity. Makes you lighter and more alive than ever!

    Water: NONE. All boiled away.

    Day length: 1 day=243 Earth days. Longest days in solar system» so fun never ends!

    Rate of turning: 0.002 km/second. Turns in opposite direction of the earth, so able to see sun rise in the west and set in the east.

    Year length: 1 year=224.7 Earth days or 0.62 of an Earth year.

    Rate of revolution: 35.03 km/second.

    Atmosphere:

    Very thick.

    96% carbon dioxide; 3% nitrogen, and 0.1% water vapor.

    Can't support life: Suffocating carbon dioxide, thick clouds of sulfuric acid, and gases create greenhouse effect so very hot and no water.

Nobody says high school and college are easy. Studying is difficult, as is memorizing information for a test. Fortunately, there are books that can help to make dealing with school easier.

Unlimited Memory by Kevin Horsley

Do you have trouble remembering everything you're studying? Feel like you have too much on your plate? Unlimited Memory by Kevin Horsley may be for you. It's a bestseller in memory improvement. This book has strategies to help you learn faster while also teaching you to become more productive. Of course, having a good memory comes in handy outside of the classroom as well. Really, this is a great book for life in general.

Student ^fs Guide to Writing College Papers by Kate L. Turabian

Many students reach college and find that essay writing in college is very different from that in high school. Whether this is the case for you or you just want to improve your writing skills, you'll want to check out Student's Guide to Writing College Papers. It's available on Kindle or in hardback or paperback forms. Right now, this one is its fourth edition. The book covers writing your actual paper, citing sources(引用来源), and style. Even English majors can find a lot of helpful tips in this book.

On Course by Skip Downing

It is another book you'll want to check out. In its eighth edition, the book provides you with self-assessment tools to help you identify what you need to change for academic success. It contains guided journal entries（分录）to help you with responsibility, self-management, self-awareness, learning and self-esteem.

How to Become a Straight A Student by Cal Newport

The book will teach you different approaches and strategies to help you score better but spend less time on studying, with a focus on studying smarter, not harder. It's available on Kindle and in audiobook(有声读物)and paperback forms.