Ex. 5 a) p. 139-140 Karpuk

Peter wrote about the cell phone invention.

A. Bell was born in the 19th century.

Alexander Bell`s family went to America.

A. Bell taught people who couldn't hear well.

Bell's work was financed by one of his pupils.

The telephone was invented by accident.

Mr. Watson didn't hear anything through the apparatus.

The first telephone exchange connected thirty one people.

Julia thinks that the most important invention for the mankind is accurate watch.

Mechanical clocks were made in the fourteenth century.

Water clocks were used in ancient Germany.

Wrist watches were mainly produced in France and Switzerland.