`I`
2. No, we won't
`->` Dẫn chứng: We won’t have cookers, dishwashers or washing machines.
3. Robots will help us do the housework.
`->` Dẫn chứng: We will have robots to cook our dinner and wash our clothes. We will have robots to look after our children, and to feed our cats and dogs.
4. Our cars might use energy from air, water or plants.
`->` Dẫn chứng: Our cars might not use gas. They might use energy from air, water or plants.
`II`
1. rubbish
2. bottles
3. factory
4. new
`III`
1. If we didn't use the car all time, we wouldn't make the air dirty.
`->` If 2: If + S1 + V2/ed, S2 + would + Vinf
2. Sydne is the cleanest city in the world.
`->` So sánh nhất với tính từ ngắn: S + be + the + adj +est
3. Because he was lazy, he got a bad mark.
`->` Because + S + V: bởi vì `->` chỉ nguyên nhân
4. Although it rained hard yesterday. I went to school on time.
`->` Although + S + V: mặc dù