The secretary opens the mail every morning.
The mail is opened by the secretary every morning.
A gardener is watering the flowers.
The flowers are being watered by a gardener.
Heavy rain caused the flood.
The flood was caused by heavy rain.
Police officers were examining the evidence.
The evidence was being examined by police officers.
A spokesman gave an interview to the reporters.
The reporters were given an interview by a spokesman.
The new manager has made some changes.
Some changes have been made by the new manager.
A guide will take you to your seat.
You will be taken to your seat by a guide.
They clean the windows every week.
The windows are cleaned every week.
They won't take a decision until next meeting.
A decision won't be taken until next meeting.
Tourists don't visit this museum very often.
This museum isn't visited very often by tourists.
People eat 40 million hamburgers every day.
40 million hamburgers are eaten every day.
Where did they invent gun powder?
Where was gun powder invented?
You mustn't waste your money on stupid things.
Your money mustn't be wasted on stupid things.
When did they translate this book into English?
When was this book translated into English?
Have they sent the package yet?
Has the package been sent yet?
We can't identify the writer of the poem
The writer of the poem can't be identified.
