while it increased to about 60 years in 2011.

　　用than引导比较状语从句突出医疗条件的变化：Second,

　　thanks to the development in science and medicine, people are

　　receiving better medical care than they used to.

　　参考范文

　　Health Changes in Developing Countries

　　As is described in the chart, in developing countries great changes have taken place in life expectancy and infant mortality rate between 1960 and 2011.

　　The life expectancy in 1960 was about 40 years, while it increased to about 60 years in 2011. At the same time, the infant mortality rate dropped from 200 per 1,000 births in 1960 to 100 per 1,000 births in 2011.

　　There are many reasons for the changes, I think.

　　First, people's living conditions have improved, so it is natural that they live longer than before.

　　Second, thanks to the development in science and medicine, people are receiving better medical care than they used to.

　　Third, developing countries are now better aware of environmental protection and they take more measures to solve the problem, which also does good to us.

　　In short, people's health condition in developing countries is becoming better and better.

　　考点四：(半)开放作文

　　请根据下面提示，写一篇短文。词数不少于50。

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