What is your favourite colour? Do you like yellow, orange or red? {#blank#}1{#/blank#}  . Do you prefer grey and blue? Then you are probably quiet, shy and you would rather follow than lead. You tend to be a pessimist (悲观的人)．At least, this is what psychologists tell us, and they should know, because they have been seriously studying the meaning of colour preference (偏爱), as well as the effect that colours have on human beings.{#blank#}2{#/blank#}  . If you happen to love brown, you did so, as soon as you opened your eyes, or at least as soon as you could see clearly. {#blank#}3{#/blank#} . A yellow room makes most people feel more cheerful and more relaxed than a dark green one，and a red dress brings warmth and cheer to the saddest winter day. {#blank#}4{#/blank#} . A black bridge over the Thames River, near London, used to be the scene of more suicides (自杀) than any other bridge in the area until it was repainted green. The number of suicide attempts immediately fell sharply (急剧地). Perhaps it would have fallen even more if the bridge had been done in pink or baby blue.{#blank#}5{#/blank#} . It is an established fact that factory workers work better, harder and have fewer accidents when their machines are painted orange rather than black or grey.

A. On the other hand, black is depressing

B．They tell us, among other facts, that we do not choose our favourite colour as grow up—we are born with our preference

C．The rooms are painted in different colours as you like

D．If you do, you must be an optimist(乐观的人), a leader or an active person who enjoys life, people and excitement

E．Light and bright colours make people not only happier but more active

F．Life is like a picture or a poem, full of different colours

G．Colours do influence our moods(情绪)－there is no doubt about it

I love hiking. In the mountains, the birds sing for me; the various trees and flowers overwhelm (征服) my eyes and the deep blue of the sky inspires me and makes me feel calm. Furthermore, I can breathe the fresh air, keeping away from the dust and pollution of the city. It seems that all my senses are awakened when I am in the mountains. More importantly, hiking teaches me a lot.

I have been a traveler since childhood and was drawn towards mountains and their beauty. Later my reading several travel books made me think if I could also go on such journeys. Finally, I decided to give it a try. After I was well-prepared to face all difficulties of the hike, I joined a group of hikers. On the way, we encouraged each other, took beautiful pictures, and sat down now and then to feel the breath of the land. All my worries disappeared and we talked and laughed just like kids. This journey excited me for a long time.

I never actually realized the need for water until I started hiking. I remember once I was on a hike where our water was not enough. It was a night hike and the next day we had to return back to our base camp following the same route. So we have to save it for emergencies (紧急事件).That day I exactly learned water is of great value and that we have a duty to save it.

Besides enjoying the beautiful natural views, you have to go out of your comfort zone and push yourself hard to challenge your normal limits when hiking. On a hike, you may sometimes get injured but you can't stop until you reach the destination. Every next try will surely make you stronger and happier if you embrace (拥抱) your injuries, pains and discomforts.

Sometimes we may have a conversation with those locals living in wooden houses. You know, mountain life is hard and difficult. But they never complain about their life. They are happy with what they have. Many times they are facing extreme weather and they just fight with them. They are so brave. What can we complain about?

A kind of blue dye (颜料) called folium had been widely used to paint pictures on the pages of manuscripts (手稿) created in the Middle Ages. But long ago, this watercolor fell out of use.

"Manuscripts are an important part of the cultural works of art in the Middle Ages," said scientist Maria in an email to CNN. "Color is a basic feature of these manuscripts. To let ancient manuscripts. keep a good condition for future generations, we sometimes need to repaint their inside pictures through the ancient dye — like folium — that was once used in these manuscripts. But everyone who knew how to prepare folium had died long ago. So 'I led a team to study this dye."

Her team turned to books from the 1400s and found one that described the plant that was its source. It is a tiny plant with silvery-green leaves. Days later, the scientists reached a village in south Portugal, where nobody knew this little plant. However, after carefully going through a plenty of different plants growing there, the scientists finally raked out the plant they wanted and brought some back to their laboratory.

Back in the lab, the scientists produced the dye with the help of an ancient text on colors. The text has clearly described the ways to make it. "It's cool to have done that work of looking in the historical records and traveling back in time," says Casadio, who was not part of this study. It recreates an ancient process. By making the dye, the scientists could study its chemistry without experimenting on priceless delicate (易损的)  works of art, she points out.

Now, the researchers don't know the dye's stability(稳定性)and its ability against the environment that may wear and break it down over time. "To know such information is necessary if we desire to make these colors last long enough," Maria said. "So our study will continue."

December 16, 2009 was the worst day of my mother's life. It was on that day that she was told her thirty-six-year-old daughter had developed breast cancer. I would never forget her hopeless expression and tear-filled eyes as I told her. That scene uncontrollably broke my heart. It was one of the few times in my life that I had seen my mother was so painful and weak.

Since I got breast cancer, the doctors had made a heavy-duty plan to fight with it, which would mean an operation on my breast, five months of chemotherapy (化疗), and five weeks of radiation therapy. It also meant that an independent single girl who lived alone was in serious need of some help and care.

Thankfully, I was blessed with my own army of family, friends and co-workers who had offered to help me out with whatever I might need, including meals and rides to doctors' appointments. But as grateful as I was, there really was only one person who I wanted by my side — my mom. Despite living 300 miles away, my mother agreed even without a second thought. She was going to be my primary caregiver, driver, personal cook, nurse, counselor, and shoulder to cry on. No one else in the world could fill her shoes. It was a job that only she could do.

The night after my first chemotherapy treatment was firmly fixed in my memory. I was never so sick in my entire life. I couldn't even keep down a glass of water. And after hours spent in the bathroom, I weakly lifted myself into bed, weeping, "Please, God, take this away from me. Please make me fed better." At that moment, my mother crawled into bed with me and wrapped her entire body around me. It looked as if l had still been a little girl.

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Over the next six months, my mom traveled between two homes just to take care of me.

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However, when I finally began to recover, my morn suddenly fell ill.