Question

Напишите данные предложения, употребив нужную по смыслу форму глагола, данного в скобках, в Indefinite Active или Passive: 1. Many organic compounds (приготавливать) from these materials. 2. Different colouring matters (содержать) in the substances used for cosmetics. 3. The food additives made by the chemists (играть) an important part in improving nutrition. 4. About million organic compounds (описывать) during the past 150 years. 5. Complex mixtures of hydrocarbon compounds which (содержать) only carbon and hydrogen (встречаться) in very large quantities as petroleum and natural gas. 6. The three known elements (соединяться) and (образовывать) a great number of compounds.

Answer 1

1 are prepared

2 are contained

3 play

4 were described

5 contain,are met

6 connect,form

Answer 2

1. Many organic compounds are prepared from these materials.
2. Different coloring matters are contained in the substances used for cosmetics.
3. The food additives made by the chemists play an important part in improving nutrition.
4. About a million organic compounds have been described during the past 150 years.
5. Complex mixtures of hydrocarbon compounds, which contain only carbon and hydrogen, are encountered in very large quantities as petroleum and natural gas.
6. The three known elements combine and form a great number of compounds.