It's against the law to drive a car when you are 15.

More aid is now given to help the poorer countries.

When you make hot drinks, just boil the water you need.

Many illnesses are caused by dirty drinking water.

We need new laws to increase pollution control.

It's not right, it's wrong. It's incorrect.

People in Africa and other countries in the developing world can't get enough water.

She was in a very difficult situation, but she was calm and kept her dignity.

Take your shoes off before you come into the house. They're dirty!

He became ill because he drank dirty drinking water.

We should turn off the lights to save electricity.

Coffee is the country's largest export to Europe.

Fair traid means that workers in developing countries get a good price for their exports.

The total now is 150, but this figure gets bigger every day.

Carbon dioxide is a greenhouse gas that causes pollution of the environment.

I was feeling rather hot so I turned down the heating.

It's nice talking to you. However, I have to leave now.

It doesn't agree with the facts. It's illogical.

If you leave your TV on standby it will use more electricity than if you switch it off.

It's not how it should be. It's imperfect.

The Chinese policy of one family, one child has been very successful.

When you are rude you are impolite.

They live in poverty. They have no money and not enough food to eat.

The Price of tickets has increased from £100 to £120.

They don't have proper toilets – they use a hole in the ground.

A famous English proverb says that a stitch in time saves nine.

The village is very remote – the nearest town is 200 km away.

We must show our respect for the teacher by not talking in class.

We should listen to each other and respect each other's views.

The ability to grow food is an important skill in poor countries.

There's a lot of sun in Africa, so the developing world should use more solar power.

Switch off the lights when you leave a room.

Doctors can treat a lot of diseases.

We can't see black holes. They're invisible.

Children as young as 5 should not have to work for a living.