1 hasn't been cleaned
2 wasn't used
3 are published
4 will be delivered
5 were the trees whitewashed
6 has tea ever been grown
7 will the houses be built
8 will new cars be produced
I haven't cleaned the room yet.
People used ink for writing many years ago.
A writer will publish the book in a month.
They will deliver pizza in half an hour.
Our pupils whitewashed the trees yesterday.
Have people ever grown tea in Ceylon and India?
Do they build new houses in our city every year?
Will they produce new cars at this plant in the future?