Astronomers study the stars and planets. The stars and planets ............. by astronomers.
are studied
Fortunately, they restarted the computer with no problem. Fortunately, the computer ............ with no problem.
was restarted
Students develop new software in their IT classes. New software .................... by students in their IT classes.
is developed
The company designed a robot to help elderly people with the housework. A robot .............. by the company to help elderly people with the housework.
was designed
They build two rockets every year. Two rockets .................... every year.
are built
In the museum, visitors use headphones to listen to the audio guide. In the museum, headphones .............. by visitors to listen to the audio guide.
are used
An anti-virus program removes computer viruses. Computer viruses ................... by anti-virus program.
are removed
We create a new folder for every subject. A new folder ..................... for every subject.
is created
They downloaded the game very quickly. The game ....................... very quickly.
was downloaded
This company made 10 000 computers last year. 10 000 computers ........... by this company last year.
were made
This phone model (not / sell) .................. anymore, now they produce a more advanced one.
is not sold
This attachment (not/send) ................. last week.
was not sent
A new photocopier (buy) ....................... next year.
will be bought
Both my email accounts (hack) .................... a few days ago.
were hacked
(the experiment / carry out) .............................. yet?
Has the experiment been carried out
My folder with photos (delete) ................. last week by mistake.
was deleted
