Вопрос № 1

By the time my parents were born Lego bricks ____ yet.

were not created
have not been created
had not been created

Вопрос № 2

A steam engine _____ by James Watt in 1765.

was created
has been created
had been created

Вопрос № 3

By 1883 the first skyscraper ______.

was constructed
has been constructed
had been constructed

Вопрос № 4

After the typewriter had been created it_____widely in the world.

was used
has been used
had been used

Вопрос № 5

The first electric cell had been invented long before the first photocopier______.

was made
has been made
had been made