Составленные предложения преобразуйте в Indefinite Passive.

Елена в категроии Английский язык, вопрос открыт 01.04.2018 в 09:54

to be written → The letter was written by him yesterday

1. The metals themselves are distinguished by their great affinity for oxygen
2. In nature oxygen may be found combined with other elements
3. Metallic properties are most marked in cesium, and least in lithium.
4. Sodium and potassium compounds are widely distributed and abundant.
5. When oxygen combines with an element, it forms a product which is called an oxide
6. Most of the sodium salts used in pharmacy are made from the carbonate or hydroxide.
8. to be finished
9. to be discussed
10.Most of the sodium carbonate produced at the present day is manufactured by the ammonia-soda process.
11. to be produced