5. Прочитайте следующие предложения. Найдите в каждом из них группу «подлежащие – сказуемое», определите время и залог. Составьте все типы вопросов к предложениям.

1. Petroleum products are useful materials derived from crude oil.

2. Refineries can produce different shares of petroleum products.

3. The largest share of oil products is used as energy carriers.

4. Hydrogen and carbon in the form of petroleum coke may also be produced as petroleum products.

5. Oil refineries will blend various feedstocks.

6. Petrochemicals have a vast variety of uses.

7. Petrochemicals can also be used as solvents or as feedstock for producing solvents.

8. The petrochemicals may be olefins or their precursors, or various types of aromatic petrochemicals.