Перепишите и переведите предложения. Обратите внимание на перевод условных предложений.

1. If he calls me, I will help him with installing the device.

2. If he were here, he would explain the error in storing this information.

3. If they had visited the USA, they would have studied the computer market there.

Прочитайте и постарайтесь понять содержание текста. Перепишите и переведите 2-й и 3-й абзацы.

WHAT IS A COMPUTER?

Computers and their many applications turned out to be among the most significant technical achievements of the century. If people only have known how the appearance of computers would have changed their life. They brought with them both economic and social changes.

A computer is a machine with a complex network of electronic circuits. A computer proves to be capable of storing and manipulating numbers, letters, and characters (symbols). The basic job of computers is processing of information. Thus computers can be defined as devices which accept information in the form of instructions, called a program, and characters, called data. Then they perform mathematical and/or logical operations on the information and give out results of these operations. The program, which tells the computers what to do, and the data, which provide the information needed to solve the problem are kept inside the computer in a place called memory.

A computer can solve a series of problems and make thousands of logical decisions very fast without being tired. A computer can replace people in dull routine work. There are times when a computer seems to operate like a mechanical “brain”, but its achievements are limited by the minds of human being. A computer cannot do anything unless a person tells it what to do and gives it the necessary information.

Computers influenced the quality of our life. Informed people of our society should be computer-literate, which means that they should be able to use computers as everyday problem-solving devices.

12. Прочитайте текст ещё раз и письменно ответьте на вопрос:

How did computers influence our society and our people?

ВАРИАНТ IV

Перепишите предложения. Выпишите из них глаголы-сказуемые, определите их видовременные формы, залог и укажите инфинитив. Переведите предложения.

1. A new concept is based on our understanding that Earth is an integral system.

2. The air in many towns and cities is being polluted by traffic and industry.

3. Many of the water sources in the country have been polluted with industrial or communal waste.

4. Some progress was made in environmental protection.