摘要：第四节 作文 基础写作 A possible version: -- According to Professor Li, there’s no doubt that the earth is becoming warmer and it is human activity that has caused it. It seems that global warming could be to blame for some natural disasters such as severe storms, floods, droughts, the spread of diseases and the disappearance of species. Meanwhile, the winter temperature in many regions in the world tends to go up for the recent years, and one of the main reasons which have resulted in this consequence is the air pollution. Unless we clear up our environment, human beings may not survive. Professor Li’s presentation was warmly received and the lecture was a success on the whole. 任务写作 Three college students from the Yangtze University, who lost their lives in order to rescue two drowning children, were honored as heroes in many ways. Their behaviour drew public attention and wide discussion. As to me, I will help the people in trouble without hesitation. Just as the saying goes, life is difficult .Everyone may face difficulties that they cannot overcome by themselves, so an instant help is important. Moreover, if you often try your best to help others, you will be helped when in trouble in return. However, I will first consider my own safety before I can rescue someone in danger because it is not worthwhile to lose one more life in case I fail. Therefore, if I had been on the spot , I would have jumped into the river to rescue the child on the condition that I could swim. If not, I would have first called the police and then persuaded the people on the boat and the swimmers nearby to help.

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