Present perfect / present perfect continuous 1. i … for you all day. where have you been? a) was looking b) have looked c) looked d) have been looking

Iwas looking for you all day.

Хочу ! незнаю точно это да или нет но вот we live in the fascinating and challenging world of science. it is a world that more and more over the ages, and especially in the 20th century has come to affect so much of our lives. it is involved with the way we travel, the homes we live in and the clothes we wear, how we become ill and how medicine can make us better, and has given us fantastic means of communicating and exploring.the list of the inventations is rather long. we are on-lookers of great scientific achievements such as television and a computer. we can't imagine our life withought a notebook or a radio. i'd like to speak in details about computers.what is a computer? a computer is an electronic device that stores information and allows changes in it through the use of instructions. a modern computer is capable of doing various tasks, like word processing and accounting. personal computers are widely used but working on them requires some techniques.a computer gives a lot of advantages to a user. the list of the advantages is rather long: computers give us access to the internet- an international computer network. you can spread a lot of your free time surfing the internet and get all sorts of information from it. you can enter the chat room with other internet users and debate urgent problems on line. if you are connectable by e-mail, you can correspond with your own web page and place there information about yourself.today computers help people to do many things. bankers use them to keep track of money. telephone operators use them to put calls through. without computers, weather forecasters would make more mistakes. computers also help scientists to solve their problems. more than that computers help police to keep order in shops. computers also help doctors to treat patients. computers allow users to spend their free time and relax. but computers have some disadvantages. computers can make people lazy. people waste their time when they play different games on a computer. people forget to go to the libraries, they often find information on the internet. wicked games can make people, especially children aggressive and stupid.