5
Look, read and match. Then listen and check​

She is ill, so she MUST see the doctor.
It’s raining heavily. You MUST take your umbrella.
We MUSTN’T pick the flowers in the park.
Mike is nine months old. He MUSTN’T eat nuts.
I am very tall. So I CAN play basketball.
I’m sorry but we CAN’T come to your party tomorrow.
You are speaking very quietly. I CAN’T understand you.
CAN I use your phone?
We CAN’T go to the bank today. We haven’t got any money.
My hands are dirty. I MUST wash them.
It’s late. I MUST go now.
You MUST stop at a red traffic light.
You MUSTN’T speed in the city.
Tourists MUST take their passports when they go abroad.
Footballers MUSTN’T touch the ball with their hands.
CAN you play the guitar?
I CAN’T come with you now. Because I’m studying my lessons.

Today our planet Earth is facing an important problem - the global warming. It occurs because of emissions of toxic gas and increasing greenhouse effect.
Polluting gases are exhausted by factories, cars and other machines. These gases pile up in the atmosphere and don't let the light reflected from Earth's surface get out of atmosphere, which actually causes the warming itself. Because of it, glaciers melt rapidly, the ocean level rises and that poses a flood threat to all islands and seaside countries. It also means an dramatic increase in number of icebergs in oceans, which basically means a threat to sea travellers. Which in its turn poses a threat to economies of a lot of different countries, since most goods are exported and imported by water trade.

Warming is also dangerous for nature since many species of plants and animals are used to live under low-temperature conditions. And if temperature goes up, then certain plants, which are actually food for animals, will die. And that in its turn will make animals starve, and then eventually die as well. And so will die animals, whose food was primarily the previously mentioned animals, and so on and so forth.

I want to live in a country with strong economy, rich flora and fauna and not-overly-hot climate!

Let us save our planet together!

Let us say 'NO' to atmosphere pollution!

Let us switch to alternative sources of energy!

Let's revive our forests!