Bài Làm :

1. Keep the environment clean or we will suffer from pullution.

 => If we keep the environment clean, we won't  suffer from pollution .

2. l last visited my native village when l was ten.

 => I haven't visited my native village since I was ten .

3. Humans don't drive as carefully as self - driving cars.

 => Self-driving cars drive more carefully than humans .

4. There aren't many people who still want to stay in the village.

 => There are only a few people who still want to stay in the village .

5. The population of Los Angeles is over 3 million.

 => Los Angeles has a population of over 3 million .

6. People will use flying cars to travel across the globe some day.

 => Flying cars will be used to travel across the globe some day .

7. Developing countries have more population problems than developed countries.

 => Developed countries don't have as many populations problems as developing countries .

8. Veronica is one of my good friends.

 =>  Veronica is a good friend of mine .

#Nothing

1. If we keep the environment clean, we won't  suffer from pollution.

2. I haven't visited my native village since I was ten.

3. Self-driving cars drive more carefully than humans.

4. There are only a few people who still want to stay in the village.

5. Los Angeles has a population of over 3 million.

6. Flying cars will be used to travel across the globe some day.

7. Developed countries don't have as many populations problems as developing countries.

8. Veronica is a good friend of mine 

Nocopy 

@gladbach