B. Choose the correct answer. 1. You mustn't / don't have to pick me up from the airport. I can take a taxi.
2. We had better / would rather put on warm clothes. It's very cold outside.
3. I have to / need be at work at 8am every morning.
4. You can't / must be tired after such a long journey.
5. Need you / Do you need to wake up so early tomorrow?
6. You needn't/ don't have worry about me, Mum. I'm not a baby any more!

Essay

Air- it's fundamental factor of life on the earth.Thanks to the air-we can lead a normal life.However, with everyear, we somehow influence the air.

People on the Earth-it is catastroph for the Planet, because we impact on the nature in negative way,and air- is not an exception.Due to industrial human activities,we polute the air more and more.when industrial plants are running, they have emissions and these emissions pollute the air.If think carefully-air is one of the most essential thing on our Planet, but we treat him with disdain, and it makes me upset.due to the fact that we ourselves pollute the air, this also makes us bad, for instance a lot of diseases caused by air pollution.

We need to treat air and environmental problems with respect, because they give life on the planet!

Объяснение:

Отметь как лучшее :)

1. What's the best choise for users who need to carry your data?

2. What characteristics should be chosen for for the great speed?

3. What makes it easy to connect and play on any computer or external hard drive?

4. What's the difficulty of making access to the information board?

5. What costs less, internal hard drive or an external one?

6. What must be paid additionally?

7. Which option would be cheaper?

8. What are the innovations whose are leaving behind the electromechanical hard disk based on?

9. Is theirs price high?

10. What is the main topic of the text?