Don’t turn round! I think we _______________ (follow)!
are being followed
You must not waste your money on stupid things.
Your money must not be wasted on stupid things.
Fifty scientists _______________ (take part) in the International Environment project so far.
have taken part
The world’s first motorways _______________ (build) in Germany in the 1930s.
were built
The boy killed the spider.
The spider was killed (by the boy)
Mary Shelley wrote the novel Frankenstein.
The novel Frankenstein was written by Mary Shelley.
My grandmother made the cake yesterday.
The cake was made (by my grandmother) yesterday
They clean the windows every week.
The windows are cleaned every week.
We can't identify the writer of the poem
The writer of the poem can't be identified.
People eat 40 million hamburgers every day.
40 million hamburgers are eaten every day.
A guide will take you to your seat.
You will be taken to your seat by a guide.
Smoking _______________ (not allow) on planes.
is not allowed
This photo __________________(take) by my grandfather when I was five.
was taken
This tree is very old. It ___________________(plant) in the 19th century.
was planted