9 клас

 an architect

  an engineer

  an inventor

  an artist

 science about plants and their structure

 science about matter and energy such as heat, light, sound

 science about the earth, including the origin and history of rocks

 science about the structure of substances and how they react when they are combined

ordinary

impressive

usual

extraordinary

 a theory of relativity

of modern space-rocket engineering

 a theory of gravity

 a theory of probability

use

 are not used

 were not used

used

 floppy disc

 four-wheel car

telephone

 gasoline engine

 in 1657 the first accurate clock was designed by Christian Huygens

  The first accurate clock was designed by Christian Huygens in 1657

The first accurate clock is designed by Christian Huygens in 1657

  Christian Huygens in 1657 designed the first accurate clock

Have.. waited

Have been waiting..

waited

did you wait

did... do

have... done

have been doing

we're doing

will you?

will not you?

won't you?

shan't you?

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Загальні

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