In choosing a friend, one should be very careful. A good friend can help you study. You can have fun together and make each other happy. Sometimes you will meet fair-weather friends, who will be with you as long as you have money or luck, but when you are down, they will run away. How do I know when I have found a good friend? I look for certain qualities (品质) of character, especially understanding, honesty and reliability (可靠).

Above all else, I look for understanding in a friend. A good friend tries to understand how another person is feeling. He is not quick to judge. Instead, he tries to learn from others. He puts himself in the other person’s place, and he tries to think of ways to be helpful. He is also a good listener.

At the same time, however, a good friend is honest. He does not look for faults (过错) in others. He notices their good points. In short, a friend will try to understand me and accept me.

Another quality of a friend is reliability. I can always depend on a good friend. If he tells me he will meet me somewhere at a certain time, I can be sure that he will be there. If I need a favor, he will do his best to help me. If I am in trouble, he will not run away from me.

There is a fourth quality that makes a friend special. A special friend is someone with whom we can have fun. We should enjoy our lives, and we would enjoy our friendship. That is why I especially like friends who are fun to be with. A good friend likes the same things I like. We share experience (经验) and learn from each other. A good friend has a good sense of humor, too. He likes to laugh with me. That is how we share in the joy of being friends. And I know that he is looking for the same quality in me.

When I meet someone who is reliable, honest, and understanding, I know I’ve found a friend!

1. If you have fair-weather friends, _____.

2.Good friends need to ______.

3. This passage mainly discusses ________.

As I understand, if scientists produced a human clone, there would be a great risk of it having a disease. Nobody seems to understand the ageing process of a clone. It would be terrible if a baby was the age of its parent at     31   . Its cells would grow old fast and it would die young.    32    until the technique is perfectly safe, it should be     33   .

I'd love to have a clone of     34   . I often wish I had a twin sister, someone who    35   me in everything. So why not a clone? Well, the idea    36   be fun but I'm not sure if it would be     37   . I think we would be playing with fire if we let scientists go ahead with     38   cloning. There are so many     39   

involved that all research in this area should be strictly controlled.

There are so many arguments     40    cloning that it is difficult to get anyone to consider the possible benefits. I am     41    that it is a technique which could be beneficial. The most obvious use would be for childless     42   . They would be able to have babies with their own genetic material. I don't see what's wrong with that.

Imagine a child     43    up knowing that his or her mother is really a sister or a brother. The emotional     44    on the child would be     45   . Or a child who was cloned from a dead brother or sister. What kind of emotional pressure would they feel, knowing they were made as a replacement for another? The whole idea

    46    me!

It's all very good to ban human cloning but scientists should be allowed to   47   

research. If they don't, we may     48    important benefits for our society, such as producing body organs. A clone is an     49    copy of a person with the same gene. Therefore, it is the     50    donor for an organ(器官) transplant.

Health is the most important thing in the world. Nothing is more important than health. If we take away our money, houses, or even our clothes, we can still survive.___1.__    That is why we always try to eat in a healthy way and exercise regularly.

How can we keep healthy? In order to eat healthily, I usually avoid eating food high in fat, like French fries or cookies, which are junk food .2._ I eat a lot of vegetables and fresh fruit which are full of vitamins.

3._ Taking exercise every day helps us build a strong body. Regular exercise is an important part of keeping me healthy.

What’s more, I think friends are an important part of one’s health. _4._I always feel better when I am with friends than I am alone. When I am with friends, I always laugh .Laughing is also an important part of health. It's good to stay with my friends.

By eating properly and exercising regularly, I can keep my mind as well as my body happy. These things sound easy to do, but not many people can manage them. ___5._

A．On the other hand , doing exercise is very important

B．There are some people who like staying alone, but they keep healthy.

C．Many students show that people with a wide range of social contacts don’t get sick

D．But if our health was taken away , it is certain that we would surely die

E. I only eat little meat

F. I think a strong will is necessary if want to keep healthy

G. Some people appear fat because they often eat too much

1 

Just as the world’s most respected scientific bodies have confirmed that the world is getting hotter, they have also stated that there is strong evidence that humans are driving the warming. Countless recent reports from the world’s leading scientific bodies have said the same thing. For example, a 2010 summary of climate science by the Royal Society stated that: “There is strong evidence that the warming of the Earth over the last half-century has been caused largely by human activity.”

The idea that humans could change the planet’s climate may be counter-intuitive, but the basic science is well understood. Each year, human activity causes billions of tons of greenhouse gases to be released into the atmosphere. As scientists have known for years, these gases hold heat that would otherwise escape to space, wrapping the planet in an invisible blanket.

Of course, the planet’s climate has always been changing thanks to “natural” factors such as changes in solar or volcanic activity, or cycles relating the Earth’s going around the sun. According to the scientific literature, however, the warming recorded to date matches the pattern of warming we would expect from a build-up of greenhouse gas in the atmosphere – not the warming we would expect from other possible causes.

Even if scientists did discover another reasonable explanation for the warming observed so far, that would beg a difficult question. As Robert Henson puts it in The Rough Guide to Climate Change, “If some newly discovered factor can account for the climate change, then why aren’t carbon dioxide and the other greenhouse gases producing the warming that basic physics tells us they should be?”

The only way to prove with 100% certainty that humans are responsible for global warming would be to run an experiment with two identical Earths – one with human influence and one without. That obviously isn’t possible, and so most scientists are careful not to state human influence as an absolute certainty.

1. In most scientists’ opinion, the global warming is mainly caused by ________.

A. solar activity                                                 

B. volcanic activity      

C. the Earth’s going around the sun                  

D. human activity

2.. The text is developed by ________.

A. giving typical examples

B. following the order of space

C. analyzing a theory and arguing it

D. comparing and finding differences

3. The underline word “identical” means ________.

A. totally different                                                      

B. exactly the same

C. extremely important                                      

D. relatively independent

4. Which of the following can be the best title?

A. Are All the Scientists Really Scientific?

B. Where Is Global Warming Leading Us to?

C. Are Humans Definitely Causing Global Warming?

D. What’s Relation of Global Warming and Greenhouse Gases?

When I was in medical college, I went camping with some of my friends on the seaside. After ____16____(arrive) there, we rented a room and left our luggage there. The sea and the weather were beautiful, ____17____ we finished lunch and then decided to rent a boat.

We started to row, but about one mile out, the weather suddenly changed. ___18____ the weather was not good, we didn’t want to give up, but finally my friends and I agreed that we should go back. We tried to change the boat’s direction, but ___19____oarlock(桨) broke. Therefore, we were unable to turn back. What we could do was wait ___20___ help.

The sea changed a lot, the waves got very high, and the boat began to shake like a cradle(摇篮). One of my friends started to cry ; ____21___ started to feel sick. There hours passed, and nobody came to help us. We were just praying. _____22_____(fortunate), after five long hours of waiting, two big boats came to rescue ____23___ and we escaped. If they ____24____(not come) to get us, we would have crossed the border between Turkey and Greece because the border was very close.

This story is ____25____(excite) story of my life because we could have died, but luck was with us and we escaped.