Why did the population grow very slowly in the beginning, and why is it now growing faster and faster?
A long
time ago, many babies died when they were only a few days or weeks old. If people grew up, many didn’t live for very long. Why? Sometimes they didn’t have enough food. Sometimes their food didn’t make them strong. But, most importantly, people became ill very easily. There were no hospitals or doctors, and people often died young.
But what will happen if the population doesn’t stop growing? We will have to use farm land to build houses. There will be no animals or plants or trees. Then there won’t be enough food in the world for everyone.
2、 按照现实环境答复以下问题。(5分)
1. What kind of music do you like best?
2. Have you got a mobile phone?
3. What do you think of Guangzhou?
4. What do you think is the most important to you?