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9.Задайте вопросы к следующим предложениям, где глаголом-сказуемым является глагол to be.

Образец: Water is the most effective agent for the extinction of fires. – Is water the most effective agent for the extinction of fires? Or: What is the most effective agent for the extinction of fires?

1.Water is suitable for cooling purposes. 2. Sometimes water is dangerous or ineffective. 3. Water is a good conductor of electricity. 4. Water is generally unsuitable for fires involving oils. 5. Water is necessary when it is not possible to extinguish fires by other means. 6. Water is cheap and almost always available.

10.Заполните пропуски в предложениях, используя приведенные ниже термины.

  1. Water is the most effective … for the extinction of fires of ordinary combustible materials.

  2. Water is usually applied in the form of … to the heart of fire.

  3. Water is a good … of electricity.

  4. Water applied on … electrical apparatus or wiring is dangerous.

  5. The apparatus and wiring should be made electrically dead before jets are applied.

  6. Sodium, potassium and calcium may … on contact with water.

  7. The hydrogen liberated … the fire.

  8. Water is generally … for fires involving oils and other inflammable liquids.

Jets, unsuitable, conductor, aggravates, agent, live, dead, ignite.

11.Замените подчеркнутые в предложении слова синонимами, приведенными ниже.

  1. Water is the most effective agent for the extinction of fires.

  2. Water is usually applied in the form of jet.

  3. Water should not be used on materials which react chemically with it.

  4. The hydrogen liberated aggravates the fire and may give rise to an explosion.

  5. When water comes into contact with hot oil violent eruption of foaming may occur.

Applied, used, happen, substance, strong, cause.

12.Соедините разрозненные части предложений.

  1. Water is the most effective substance …

  2. Water is usually applied …

  3. But sometimes water is …

  4. The apparatus and wiring should be …

  5. Sodium, potassium and calcium may …

  6. Calcium carbide when wetted …

  7. Water on burning magnesium or titanium …

  8. The hydrogen liberated may …

  9. Water is generally unsuitable for fires …

  1. … made electrically dead before jets are applied.

  2. … ignite on contact with water.

  3. … is decomposed.

  4. … for extinction of fires.

  5. … involving oils and other inflammable liquids.

  6. … dangerous or ineffective.

  7. … gives off inflammable gas acetylene.

  8. … give rise to an explosion.

  9. … in the form of jet.

13.Дайте ответы на вопросы, используя в своих ответах следующие фразы: as far as I remember, if I am not mistaken, as far as I know.

  1. What is the most effective agent for extinction of fires?

  2. How is water usually applied?

  3. Why is water sometimes dangerous?

  4. How should water be used?

  5. When shouldn’t it be used?

  6. What can you say about water application on oil and other inflammable liquids?

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