Johny and Marry___cleaning the kitchen at the moment

Solar enegry and hydro energy are___sources

My parents___at a big hydro power station

Using non-renewable energy sources like coal, oli___a lot of carbon dioxide

A solowheel___electricity, so it is safe for the environment

We can protect___by reducing our use of coal and gas

He usually comes back home at one o'clock, but today he___late

Are they having dinner?

Jane's voice is good___is good, too

Wind is one type of___sources of energy

We should___a bike when travelling short distances

Fumeless cars___pollute the environment like the cars we have now do

I often the piano in the evening, but tonight i am watching TV

Mrs Lien is teaching us about solar energy___the moment

A friend of___is coming to play with me next month

Some people are using vehicles that run___safer energy for an eco-friendly environment

Some people are using vehicle that run___ safer energy for an eco-friendly environment

Look! Aunt helen___feeding the ducks on the farm

It___take a long time for travelling by teleporter to become areality, i think

I think we___have electric taxis very soon

Nuclear energy is dangerous___expensive

In the green future, vehicles will be powered by___

People___consider travelling by public transport to reduce traffic jams

What will they do reduce traffic jam?