A
The office is cleaned every day.
The office was cleaned yesterday.
Somebody cleans the office every day.
Somebody cleaned the office yesterday.
B
Butter is made from milk.
Oranges are imported into Britain.
How often are these rooms cleaned?
I am never invited to parties.
This house was built 100 years ago.
These houses were built 100 years ago.
When was the telephone invented?
We weren’t invited to the party last week.
Was anybody injured in the accident?
Yes, two people were taken to hospital.
C
I was born in Birlin in 1993.
Where were you born? In Cairo.
D
The telephone was invented by Alexander Bell in 1876.
I was bitten by a dog a few days ago.
Do you like these paintings? They were painted by a friend of mine.
