`I.`
1. T
`->` Dẫn chứng: If they don't breath, they will die.
2. F
`->` Dẫn chứng: Plants and animals need clean air too.
3. T
`->` Dẫn chứng: A lot of things in our lives create harmful gases and make the air dirty, like cars, motorbikes and factories.
4. F
`->` Dẫn chứng: Air pollution can also make our Earth warmer.
`II.`
1. Because a robot can not think or do alone.
`->` Dẫn chứng: Because a robot can not think or do alone, people use a computer to control it.
2. They can help us save a lots of time and work.
`->` Dẫn chứng: They can help us save a lots of time and work.
3. They are too expensive.
`->` Dẫn chứng: Today, robots are not popular because they are too expensive, but they are very useful.
4. No, they don't.
`->` Dẫn chứng: However, some people do not like robots.
