ответить на вопросы 1. Into what groups can construction materials be divided?

2. What are the advantages (disadvantages) of wood, stone, metals?

3. What two groups are metals divided into?

4.What is the difference between ferrous and non-ferrous metals?

1)Building materials are divided into natural (natural) and artificial(Строительные материалы разделяют на природные (естественные) и искусственные)

2)Не смогу сказать.

3)metals are divided into two groups: ferrous and non-ferrous(металлы делятся на две группы: черные и цветные)

4)Ferrous metals are those that contain steel and iron.Non-ferrous metals do not contain steel or iron. This group of metals includes: aluminum and copper, Nickel and lead, zinc and tin, brass and gold, silver and platinum, as well as many others that do not contain iron.(Чёрными называются те металлы, которые содержат сталь и железо.Цветные металлы не содержат стали и железа. К данной группе металлов относятся: алюминий и медь, никель и свинец, цинк и олово, латунь и золото, серебро и платина, а так же многие другие, не содержащие железо.)

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

my younger brother had his birthday on sunday. i proposed to arrange  a birhday party/picnic for him and his friends. "not a bad idea! said my parents.we decided to spend  a weekend in the country. i was responsible  for the social programme.we played funny games and sports, sang songs,danced and took pictures.my brother and his friends enjoyed      the  picnic."that was great",he said and kissed me.

                  next year we are going to arrange a birthday picnic for my brother and his friends again.

остальные слова вставлять не требуется. по в - они не относятся к этому тексту.

1. was. 2. was thinking. 3. called. 4. did  i tell. 5. happened. 6. were shopping. 7. were looking. 8. came. 9. showed. 10. she was opening. 11. had. 12. was. 13. didn"t expect.