1.The Internet ................ invented until after World War II. The first networks were installed in the 1960s and 70s.
didn't
wasn't
isn't
2.Home computers weren’t sold in large numbers in the 1980s. Nowadays, however, a computer or a laptop ..................... by someone every day!
is bought
was bought
are bought
3.These pictures ....................... by my grandfather many years ago. Also, you’ll see that some of the rooms in the house are decorated with his sculptures.
painted
are painted
were painted
4.Nowadays, most household jobs aren’t done by hand. Devices like vacuum cleaners or dishwashers ....................... to make these jobs less exhausting.
are bought
bought
were bought
5.How often is the machine .................... by a technician?
