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