The Harry Potter series __________________ by J. K. Rowling.
wrote
was written
is written
written
The most famous portrait in the world, Mona Lisa, ________________ by Leonardo da Vinci.
is painted
has been painted
were painted
was painted
X-rays __________________ in 1895 by Wilhelm Conrad Roentgen, who was a German Professor.
discovered
were discovered
is discovered
are discovered
Scissors ___________________ for cutting thin materials, such as paper and metal foil.
are used
use
is used
used
The movie Avatar _______________ by James Cameron.
directed
is being directed
was directed
is directed
Wooden toothpickes ______________ from birch wood.
will be cut
have been cut
are cut
were cut
The last Olympic Games _____________ in Tokyo.
were held
will be held
have been held
are held
When ___________ the Great Wall of China ____________?
were / built
was / built
built / were
is / build
Cars _______________ in factories.
are produced
were produced
is being produced
produced
The tunnel _________________________ at the moment, so it's closed for all traffic.
is being repaired
will be repaired
is repaired
repaired
Olives _______________ in Mediterranean countries.
was grown
is grown
are grown
has been grown
Brilliant ideas ________ generally __________.
is / copied
were / copied
are / copied
have been / copied
The light bulb ____________________ by Thomas Edison.
were invented
were not invented
was not invented
has not been invented
How often __________ hotel carpets __________?
will be / cleaned
are / cleaned
is / cleaned
was/ cleaned
Google ____________ officially ____________ in 1998.
is launched
was launched
were launched
has been launched
