Previously, our ancestors measured time in different ways, for example: water clock, oil clock, sundial, obelisk. The first who knew that the day 24 hours were ancient Egyptians. They distinguished two parts in the day - dark and light time.
The first mechanical watches with a liquid escapement were made in Tang China in 725 AD by Yixing and Liang Lingzan. Then, every year, century, the clock became simpler and clearer. Nowadays there are electronic, radio frequency mechanical clocks. The most practical watch is an electronic one from such a watch you can even call to measure it, etc. The watch nowadays not only fulfills its function, but also people often use it as an accessory.
I believe that the clock has changed dramatically in its development.
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Вставить правильный ответ 2. the plane … to be on time. a) expects b) is expected c) will expected 3. the math problem … to students now. a) is explained b) was explained c) is being explained 4. the game … by their team. a) will probably be won b) probably will win c) will have probably won 5. soccer … in many countries. a) is being played b) is played c) will play. 6. yesterday i read that the town … be terrorists. a) had been attacked b) has attacked c) has been attacked 7. the robbers … to jail by the judge. a) was sent b) were sent c) will sent 8. all the books … to the library by tomorrow. a) will be returned b) will return c) will have been returned 9. english … by many people. a) has been spoken b) is speaked c) is spoken 10. while the robber … by the police, he fell over and broke his leg. a) was being chased b) was chased c) had been chased 11. they … the news as soon as possible. a) should told b) were told c) should be told 12. where is my sandwich? – it … by the dog. a) will be eaten b) has been eaten c) is eaten