Police officers were examining the evidence.
The evidence was being examined by police officers.
Heavy rain had caused the flood.
The flood had been caused by heavy rain.
A gardener is watering the flowers.
The flowers are being watered by a gardener.
By the time we got to the party, all the pizza _______________ (eat).
had been eaten
Cedric Diggory .......... (murder) by Lord Voldemort
was murdered
Champagne .............. (drink) on New Years Eve
is drunk
People eat 40 million hamburgers every day.
40 million hamburgers are eaten every day.
Spanish ............... (speak) in many countries
is spoken
The windows ................ (cleaned) every week.
are cleaned
Have they sent the package yet?
Has the package been sent yet?
The machines .................... (use) to mix ingredients.
are used
Where ................ the computer ............. (invent)?
was invented
The secretary opens the mail every morning.
The mail is opened by the secretary every morning.
Smoking _______________ (not allow) on planes.
isn't allowed