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1、概要寫作SummaryWriting,閱讀下面短文，根據(jù)其內(nèi)容寫一篇60詞左右的內(nèi)容概要。Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7.3 billion people share the planet. By 2050, some scientists estimate, the worlds population may reach 9 billion. However, the changing climate

2、 will probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists.Just three cropswheat, rice and cornprovide more than two-thirds of the calories that people consume. Such crops, and a small number of other important crops, come from farm

3、ing regions sometimes referred to as “breadbaskets”. However, these areas often occupy a relatively small portion(部分) of the globe. Worse still, the breadbaskets are easily affected by bad weather. Events such as widespread flooding or extended heat wave can kill crops. Thats especially true if the

4、bad weather occurs when a crop is young, fruiting or approaching harvest.Unfortunately, big crop failures in two or more breadbaskets could lead to what researchers call a “food shock”. That means an overall shortage of food would occur. Extreme food shocks used to happen every century. Or to put it

5、 another way, thats only about once in very four generations of humans. However, according to studies, as the climate warms, high and low temperatures become more extreme, and by 2050, food shocks could occur about once every 30 years. In other words, a person born in the middle of the current centu

6、ry might live through two or three extreme food shocks during their lifetime.So what can people do to help avoid food shocks? Making agriculture efficient is one choice. But one of the most effective ways to fight against food shocks might be to cut down on food waste. “If we could cut food waste in

7、 half,” said Seth Cook, a British environmental scientist, “we could feed an extra billion people.”,3. add some transitional words to make the passage smooth.,1. Find out key information of each para.,2. Rewrite the key information,Express the same meaning using your own words , phrases or structure

8、s.,Concise ! 60-70 words,Step 1: Careful reading for the key words, phrases or sentences in each paragraph Underline or circle the key information,Para. 1: Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7.3 billion people share the plan

9、et. By 2050, some scientists estimate, the worlds population may reach 9 billion. However, the changing climate will probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists.,Para. 1: Feeding the worlds population is a big challenge, an

10、d it is about to get bigger. Right now, a little more than 7.3 billion people share the planet. By 2050, some scientists estimate, the worlds population may reach 9 billion. However, the changing climate will probably make feeding this far greater number a very frightening task. That is the conclusi

11、on reached by some scientists.,Para. 1: Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7.3 billion people share the planet. By 2050, some scientists estimate, the worlds population may reach 9 billion. However, the changing climate will

12、 probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists.,Para. 1: Feeding the worlds population is a big challenge, and it is about to get bigger. Right now, a little more than 7.3 billion people share the planet. By 2050, some scient

13、ists estimate, the worlds population may reach 9 billion. However, the changing climate will probably make feeding this far greater number a very frightening task. That is the conclusion reached by some scientists.,Para. 2: Just three cropswheat, rice and cornprovide more than two-thirds of the calo

14、ries that people consume. Such crops, and a small number of other important crops, come from farming regions sometimes referred to as “breadbaskets”. However, these areas often occupy a relatively small portion(部分) of the globe. Worse still, the breadbaskets are easily affected by bad weather. Event

15、s such as widespread flooding or extended heat wave can kill crops. Thats especially true if the bad weather occurs when a crop is young, fruiting or approaching harvest.,Para. 2: Just three cropswheat, rice and cornprovide more than two-thirds of the calories that people consume. Such crops, and a

16、small number of other important crops, come from farming regions sometimes referred to as “breadbaskets”. However, these areas often occupy a relatively small portion(部分) of the globe. Worse still, the breadbaskets are easily affected by bad weather. Events such as widespread flooding or extended heat wave can kill crops. Thats especially true if the bad weather occurs when a crop is young, fruiting or approaching harvest.,Para. 2: Just three cropswheat, rice and cornprovide more than two-thirds