Сэтими текстами как их правильно читать, нужно написать по текст как читать его на 1. we are always told that we should clean our teeth regularly to keep them healthy and to have fresh breath. it is believed that people started using a kind of paste to clean their teeth around 5000 years ago. however, the ingredients of these tooth powders were very different from ours. for example, the people of ancient egypt used salt, mint, dried flowers and pepper to create tooth powder. later, in the 18th century, in some countries in europe, people brushed their teeth with burnt bread. the first toothpaste appeared in 1890, in great britain. at first it was sold in jars. then special tubes were designed to make the toothpaste more comfortable to use. 2. a robot is a machine that does work for people. the word ‘robot’ appeared in the 1920s and it was first used in a science fiction story. in real life, the robot was invented later, in 1954. there are different kinds of robots which are used in different industries. most of them are operated with the help of a computer program. instead of humans, robots do hard and boring work in unpleasant or dangerous environments. they usually work faster and more accurately than people. they never get tired and do not make mistakes. nowadays robots are often used for domestic needs – to clean houses or to look after sick and elderly people. scientists say that soon robots will become a normal part of our life, like mobiles and computers today.

kyvsaar    2   17.04.2019 09:48    24