The world’s first motorways _______________ (build) in Germany in the 1930s.
were built
3D films _______________ (exist) since 1922, when The Power of Love was first shown.
have existed
Smoking _______________ (not allow) on planes.
isn't allowed
This tree is very old. It ___________________(plant) in the 19th century.
was planted
This photo __________________(take) by my grandfather when I was five.
was taken
Not much ____________(know) about other planets.
is known
Police officers were examining the evidence
The evidence was being examined by police officers.
Heavy rain caused the flood.
The flood was caused by heavy rain.
They clean the windows every week.
The windows are cleaned every week.
Tourists don't visit this museum very often.
This museum isn't visited very often.
People eat 40 million hamburgers every day.
40 million hamburgers are eaten every day.
They have invited him to the cinema.
He has been invited to the cinema.
My friends have studied English.
English has been studied by my friends.
The cats ______(love) by us.
are loved
A movie _____(watch) by us everyday.
is watched
The kids have played the game.
The game has been played by the kids.
