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3. Fill in the gaps using the text:

  1. Gold, silver and copper were found by...

  2. Iron can be separated from its ores in reasonably... quantities and at fairly ... cost.

  3. Metals have comparatively high .. .with the exception of mercury.

  4. Steel is still the basic material of...

  5. Bronze is used for objects intended to resist.. .of the atmosphere.

  6. In the ancient times, gold, silver, copper, tin, iron, lead and mercury... as ..,

  7. From the point of tonnage produced and used ...is the« world's most common metal

  8. Zinc... in its role as one of the constituents of the alloy brass.

  9. The present age is... and it is important that we should have some acquaintance with these useful substances.

10. Seven or eight metals .. .until the eighteenth century.

4. Translate the following words into English:

Золото, срібло, мідь, свинець, сталь, цинк, нікель, кобальт, залізо; існувати, знайомство, тепло, латунь, ртуть, ковка, точка плавлення, дорогоцінні матеріали, сплав, речовина(сполука), відокремлювати.

5. Transform sentences from Active to Passive Voice: Example Romans cremated Julius Caesar's body 2,000 years ago.

Julius Caesar's body was cremated 2,000 years ago.

  1. People use steel for producing armaments.

  2. Primitive man found metals free in nature.

  3. If someone mixed tin with copper the resulting substance would be harder,

  1. Scientists developed methods for separating iron from its ores in reasonably large quantities and at fairly low cost

  1. People knew zinc as one of the constituents of the alloy brass.

  2. Analyst can melt metals high melting point temperature.

  3. We call bronze an important material in the scientific and technical progress.

6. Make up Passive tense forms with the following words:

Example: to do

Indefinite

Continuous

Perfect

Present

is done

is being done

have been done

Past

was done

was being done

has been done

Future

will be done

will have been done

to knew, to change, to use, to increase, to findj to mix, to give, to develop, to separate, to call, to produce.

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