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9.6 Arrange the words according to the table and then fill in each gap with the suitable word.

atomic, actually, optical, successfully, frequency, connection, suitable, considerably, purity, application, detectable

Noun

Adjective

Adverb

  1. Lasers were … first called optical masers.

  2. Lasers are more … for generation of energy.

  3. A precise … is natural for the laser.

  4. The … of the laser can be increased … .

  5. Lasers can operate in a very high … region.

  6. The secret of their success was the high … of the glass used.

  7. There are pollutant particles in the air that might be … by a laser beam.

  8. In most of the medical applications the laser is like a … knife.

  9. This method has been used … on human eyes.

10. The scientists choose this material for its simple … structure.

9.7 Fill in the gaps with the suitable derivative of the word given in brackets.

  1. People experienced the same feeling after the … (invent)… of the steam engine.

  2. In the 20th century … (rely) … petrol engines became available.

  3. There were some … (restrict)… for using motor cars.

  4. The motor car is one of the great human … (achieve) … .

  5. Modern cars need servicing … (constant) … .

  6. Many designers were involved in the … (develop)… of electric vehicles.

  7. A … (solve)… to this problem might be an electrically driven car or a taxi.

  8. This problem was solved by the … (introduce) … of a new three-wheel car in Britain.

  9. You can repair these damages in your car very … (easy) … .

9.8 Distribute the following words into nouns, adjectives and adverbs and then fill in each gap with the suitable word.

convenient, solution, responsibility, differently, applicable, discovery, constantly, assumption, practical, failure

Noun

Adjective

Adverb

  1. Don’t rely on this information as it’s pure … .

  2. The engineers have to study new developments in engineering … .

  3. It was a very … moment to discuss a new project.

  4. New scientific … make work easier to do.

  5. There were no simple … to this engineering problem

  6. Engineering education developed very … in Europe and the UK.

  7. The previous solution is not … to this particular case.

  8. An engineer has to take … for designing the product itself.

  9. That new engineering project was a complete … .

  10. These results are of … use.

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