The green peace tries to protect our Earth from pollution.
The protection of our Earth is a very important problem.
We use protective clothing in our factory.
We have a lot of waste paper
It s a waste of time to go there
This town is polluted by factories.
We disscussed the problems of air pollution and sea pollution
We must think about antipollution laws
It is necessary to protect the enviroment
the pollution of Moscow is very high
We must clean up the environment
They disscussed a report about environmental problems.
I'm reading.
He's not writing.
We're not working.
Are you reading?
Is he sleeping?
Kolya and Misha are playing football.
Kate is playing the grandpiano.
She's not singing.
My sister's sleeping.
Is father drinking tea?
Are your parents drinking tea?
I'm not sleeping.
She's sitting at the table.
We're doing the exercise.
We're not sleeping.
Are they playing in the yard?
Nina and Anya are washing the floor.
Kolya is helping his mum.
Are you helping father?
My sister is reading an interesting book.
They are going to school.
Are you going to school?
Is he working?
Is your granny going to the store?
Is he buying sweets?
Where are they going?
What are these boys carrying?