Computer science or computing science is the study of the theoretical foundations of information and computation, and of practical techniques for their implementation and application in computer systems. it is frequently described as the systematic study of algorithmic processes that create, describe and transform information. according to peter j. denning, the fundamental question underlying computer science is, "what can be (efficiently) automated? ". computer science has many sub-fields; some, such as computer graphics, emphasize the computation of specific results, while others, such as computational complexity theory, study the properties of computational problems. still others focus on the challenges in implementing computations. for example, programming language theory studies approaches to describing computations, while computer programming applies specific programming languages to solve specific computational problems. the general public sometimes confuses computer science with vocational areas that deal with computers (such as information technology), or think that it relates to their own experience of computers, which typically involves activities such as gaming, web-browsing, and word-processing. however, the focus of computer science is more on understanding the properties of the programs used to implement software such as games and web-browsers, and using that understanding to create new programs or improve existing ones.
найдите в тексте все предложения в passive voice, определите их видо-временную форму и образуйте отрицательную и вопросительную форму.

I would like to visit London, now I’ll tell you what I know about him                   London is the capital of Great Britain, its political, economic and cultural centre. It's one of the largest cities in the world. Its population is more than million people. London is situated on the river Thames. The city is very old and beautiful. It was founded more than two thousand years ago. Traditionally London is divided into several parts: the City, the West End, the East End and Westminster. The City is the oldest part of London, its financial and business centre. The heart of the City is the Stock Exchange. Westminster is the most important part of the capital. It's the administrative centre. I also know that, the Houses of Parliament, the seat of the British Government, are there. It's a very beautiful building with two towers and a very big clock called Big Ben. Big Ben is really the bell which strikes every quarter of an hour. Opposite the Houses of Parliament is Westminster Abbey. It's a very beautiful church built over 900 years ago. The tombs of many great statesmen, scientists and writers are ther

Объяснение:

exercise 3

begin-begandrink-drankgo-wentdo-didgive-gavehave-hadtake-tooksee-sawmeet-metbe-was/were

exercise 4

gets upis 'taren'tdowakes

exercise 5

a) Maths, Science, Thursday, Physical Education, Technology

b) sharpener, notebook, pencil case, umbrella, ruler

c) bathroom, bedroom, living room, kitchen, furniture

d) budgie, tortoise, cat, goat, guinea pig

exercise 6

doll-dollsboy-boyswatch-watchesball-ballsglass-glasseslady-ladieswoman-womenchild-childrenwindow-windows

exercise 7

Выбери неправильное слово

a\some carrots

a\an apple

a\some pineapples

a\some bread

a\some juice

a\an tomatoes

an tomatoes - неправильно, остальное - правильно

exercise 8

a) Where do emus live?

Emus live in Australia.

b) How many years do they live?

They live for nearly 30 years.

c) What do they eat and drink?

They eat leaves, fruit and insects and they drink a lot of water.

d) What do they like?

They like sitting in the mud.