This is book. it is my book. 2. is this your pencil? — no, it isn't my pencil, it is ray sister's pencil. 3. i have sister. my sister is engineer. my sister's husband is doctor. 4. i have no handbag. 5. is this watch? — no, it isn't watch, it's pen. 6. this pen is good, and that pen is bad. 7. i can see pencil on your table, but i can see no paper. 8. give me
chair, please. 9. they have dog and two cats. 10. i have spoon in my plate, but i have no soup in it. нужно вставить артикли и объяснить почему он там стоит
lektrichestvoSuch inventions as the wheel, often born by chance that people searching for solutions to their everyday problems. But the invention of electricity was the result of scientific research.Scholars of ancient Greece knew that if you rub amber, in Greek "electron", obtained a magnetic force that attracts birds feathers. They believed amber toy and did not know how to use it.Only 200 years ago, scientists have understood how electricity can be used. Widely known for the case of Benjamin Franklin, who in 1752 launched a kite during a thunderstorm. He saw that the ropes stood vertically. When he touched the metal key, I got an electric shock. This was proof that the clouds contain electricity.Franklin wrote in his journal, "Richard's Almanac unfortunate" that the installation of lightning conductor can protect the house from the storm. Moreover, the electric charge will strike grounded metal rod rather than a building.When American homes began installing lightning rods, the priests began to vigorously protest, claiming that the thunder of God expresses anger and can not communicate with him.