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Исправте ошибки в предложении и объясните почему это ошибка

1. I'm working. 2. We are working. 3. They don't work. 4. Do you work? -- Yes. 5. Does it work? -"No," I said. He's learning. 6. My brother does not teach. He works. 7. Do you wear glasses? 8. Do you help people? 9. Does he like to read fairy tales? 10a likes to play the violin? 11. My sister doesn't read books. 12. Our grandmother likes to sleep on the diva-ne. 13. Do you like to relax in a chair? 14. We eat and drink in the kitchen. 15. My brother doesn't like to read newspapers. 16. We sleep in the bedroom. 17. My brother sleeps on the couch in the living room. 18. My sister

1) The properties of building and materials are classified into four groups: physical, mechanical, chemical, technological, etc.

2) Resistance to salt aggression and other chemicals (wood)

An important advantage of natural stone is strength, durability, resistance to environmental influences, frost resistance (stone)

Strength; reliability; versatility; combination with other materials (metal)

3) All metals are divided into two groups: ferrous and non-ferrous

4) Ferrous metals and alloys contain iron, non-ferrous metals do not. Ferrous metals are mild steel, carbon steel, stainless steel, cast iron and wrought iron. ... Since they do not contain iron, non-ferrous metals have a higher resistance to corrosion and rust.

Объяснение: just decided