12. Paraphrase the following sentences replacing the subordinate clauses by the Subjective Infinitive Complex.

Model: It is believed that nature uses carbon dioxide as its primary carbon source. – Nature is believed to use carbon dioxide as its primary carbon source.

1. It is believed that the atmosphere, oceans, earth, and biosphere are strongly coupled through the chemical process that takes place in each region. 2. It is believed that the quality of human life has been greatly influenced by man-made organic compounds. 3. It is believed that the development of plastics and synthetic fibres has allowed us to improve nature and also to conserve valuable resources. 4. It is known that proteins are synthesized from amino acids in the cells of plants and animals. 5. It was expected that the conference on pollution problems would take place in London.

13. Translate into Ukrainian the following sentences with the Subjective Infinitive Complex:

1. These elements are known to have been found twenty years ago. 2. The group is believed to complete the research next month. 3. A very few compounds of the inert gases appeared to have been reported at that time. 4. Radon was found to be the heaviest of the inert gases. 5. Absolutely dry chlorine does not seem to attack metals. 6. These elements are known to have been found recently. 7. Slight amounts of helium proved to be present in the earth’s atmosphere. 8. Carbon disulphide proves to be the best solvent for phosphorus. 9. The early chemists appear to have learned arrange certain substances into two groups according to the properties those substances possess. 10. Potassium permanganate proves to be a very good oxidizing agent for preparing chlorine. 11. Plants have been found to have their catalysts, called enzymes. 12. Most biochemical reactions are known to be organic. 13. Much atmospheric ozone seems to be formed by the action of solar ultraviolet light in the upper regions of the atmosphere. 14. Plants are considered to require nitrogen in the form of nitrates. 15. All the tissues of the animal organism are known to contain nitrogen in the form of proteins. 16. Animal and plant life is said to contain a wide variety of organic and inorganic compounds. 17. Helium is known to have been discovered in 1868 in the atmosphere of the sun, where it is an important constituent.

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