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Science, scientists, technology.
The word “science” comes from the Latin word “scientia”, which means “knowledge”. Science covers the broad field of knowledge that deals with facts and the relationship among these facts.
Science has a great influence on our lives. It provides the basis of modern technology- the tools and machines that make our life and work easier. The discoveries and inventions of scientists also help to shape our view about ourselves and our place in the universe.
Scientists study a wide variety of subjects. Some scientists search for clues to the origin of the universe and examine the structure of the cells of living plants and animals. Other researchers investigate why we act the way we do, or try to solve complicated mathematical problems.
Scientific study can be divided into three major groups: the natural, social, and technical sciences. As scientific knowledge has grown and become more complicated, many new fields of science have appeared. At the same time, the boundaries between scientific fields have become less and less clear. Numerous areas of science overlap each other and it is often difficult to tell where one science ends and another begins. All sciences are closely interconnected.
Scientists use systematic methods of study to make observations and collect facts. They develop theories that help them to order and unify facts. Scientific theories consist of general principles or laws that attempt to explain how and why something happens or has happened. A theory is considered to become a part of scientific knowledge if it has been tested experimentally and proved to be true.
Science has contributed much to modern technology. Some modern technologies, such as nuclear power production and space travel, depend heavily on science.
1. He goes to school every day.
2. I like swimming.
3. You play badminton on Saturdays.
4. The class begins at 9 a.m.
5. Sometimes they go to the cinema.
6. She loves chocolate.
7. We study French.
8. They live in London.
9. He works in a restaurant.
10. Lucy plays the guitar.
11. We cook every day.
12. He cleans the house at the weekends.
13. I like reading detective stories.
14. You come from France.
15. John and David often go to the restaurants.
16. Susie studies English every night.
17. The train leaves at 6 p.m.
18. We go to the park on Sundays.
19. He likes taking photographs.
20. The moon goes round the earth.
1.
I went to the cinema yesterday.
I was going to the cinema at four o'clock yesterday.
I was going to the cinema when you met me.
I was doing my homework when mother came home.
I did my homework yesterday.
I was doing my homework at six o'clock yesterday.
I did not play the piano yesterday. I wrote a letter to my friend.
I wasn't playing the piano at four o'clock yesterday. I was reading a book.
2.
When I came home, my little sister was sleeping.
When Nick came home, his brother was playing with his toys.
When mother came home, I was doing my homework.
When father came home, Pete was sleeping.
When mother came home, the children were playing on the carpet.
When I went to school, I met my friend.
When we went to the cinema, we met grandmother.
When grandmother went home, she saw many children in the yard.
When I was playing in the yard, I suddenly saw my old friend.
When Nick was running about in the yard, he fell.