20.1
Glass is made from sand
Stamps are sold in a post office
Foodball is played in most countries
This machine is not used very often
What language is spoken in Ethiopia?
What is this machine used for?
20.2
This room was painted last month
These housed were built about 50 years ago
Ann's bicycle was stolen last week
Three people were injured in the acccident
When was this church built
When was television invented
How was the window broken
Was anybody injured in the accident
Why was the letter sent to the wrong address
20.3
is made
were damaged
are spoken
were built
are shown
was made
was stolen was found
was invented
was paid
20.4
was born in
her parents were born in
I was born in
my mother was born in