Gao Xinyi, 14, No 1 Middle School Affliated in CCNU Chao Yang School, Beijing

I was once asked to give a speech in English in front of several native speakers at an organization last summer. I was asked to talk about my experience. At the beginning, I explained to the organizers that I was afraid to speak without preparation. But they told me that I had better get over it. When I first stood up in front of the crowd, my mind went completely blank. But then I began to talk about my story and used some gestures and facial expressions. Although I didn't speak very well, I still did it.

Ye Tong, 14, Hangzhou Entel Foreign Language School, Zhejiang

    To be honest, I wasn't a brave girl. I still slept with my mother until I was a sixth-grader, because I didn't dare to sleep alone. Last year, one evening after I came back from school, my mom asked me to sleep in my own room. I thought I had grown up, so I should learn to be independent. Though I was frightened at first, I slept in my own room for the first time. I did it. I'm really proud of myself! This is the bravest thing I have ever done.

Zhang Yiyi, 14, Taiyuan Foreign Language School, Shanxi

I didn't dare to ride the roller coaster all the time. I thought it was a terrible thing. However, my friend asked me to try it when we were in Disneyland, in Hong Kong last year. I decided to take a try. It took off so fast. It was a cool feeling, like you were flying! That was extremely good fun. Someone once said, "Life is a roller coaster ride, tighten your seat belts, enjoy the journey, remember the up always has a down." That is right. I have fallen in love with the roller coaster.

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    Research proves that nearly half of the cancers diagnosed(诊断) in the UK each year-over 130, 000 in total- are caused by life choices that include smoking, drinking and eating the wrong things.

    Tobacco(烟草) is the biggest factor, causing 23% for cases in men and 15.6% in women, says the Cancer Research UK report. Next comes a lack of fresh fruit and vegetables in men's diets, while for women it is being overweight. Lead author of the report, Professor Max Parkin, said: "Many people believe cancer is related to fate or in the genes(基因), and that it depends on luck whether they get it or not. Looking at all the evidence, it is clear that around 40% of all cancers are caused by things we mostly have the power to change."

    For men, the best advice appears to be: stop smoking, eat more fruit and vegetables and cut down on how much alcohol you drink. For women, again, the best advice is to stop smoking, but also watch your weight.

    In total, 14 lifestyle and environmental factors, such as where you live and the job you do, cause 134, 000 cancers in the UK each year.

    Some risk（风险） factors are well founded, such as smoking's link with lung cancer. But others are less well recognized. For stomach cancer, a fifth of the risk comes from having too much salt in the diet, data suggests. Some cancers, like mouth and throat cancer, are caused almost entirely by lifestyle choices. But others, like gall bladder cancer(胆囊癌), are largely unrelated to lifestyle.

    Public Health Minister, Anne Milton, said: "By making small changes you can cut your risk of serious health problems- giving up smoking, watching you drink, getting more exercise and keeping an eye on your weight."