Перепишите. Вставьте попущенные слова. sources
origin
design
steam
ancient
reliability
demand

1. Many traditions are of recent , but some of them date back to times.
2. He is working on the of a new engine.
3. During the Industrial Revolution engines appeared.
4. Many new of energy are used nowadays.
5. We pay much attention to of new devices.
6. The profession of an engineer is always in great .

adrian55RUS    3   14.02.2021 12:39    68