Complete the sentences. Find the ending of the sentences in the right column:
1. Engineering … .
2. It is based on … .
3. In ancient times engineering work was done … .
4. In the Middle Ages the methods and devices of work … .
5. In the 18th century … .
6. Steam gave man … .
7. Since the 19th century both scientific research and its practical application … .
8. In thr 20th century the mechanical engineer had … .
9. the engineer has new and … .

a) many new sources of power such as electricity, gasoline, atomic power, etc.
b) the Industrial Revolution began.
c) One of the most ancient occupations in history.
d) And much stronger materials to work with.
e) By means of slave labor.
f) Became more efficient.
g) Theoretical sciences such as physics and mathematics.
h) Great sources of energy.
i) Have greatly progress.

1. Engineering is one of the most ancient occupations in history. (c)
- This means that engineering is a profession that has existed for a long time and has been practiced by people in various civilizations throughout history.

2. It is based on theoretical sciences such as physics and mathematics. (g)
- Engineering relies on the knowledge and principles of physics and mathematics to design, create, and improve structures, machines, and systems.

3. In ancient times engineering work was done by means of slave labor. (e)
- In ancient civilizations, engineering tasks were often carried out by enslaved individuals who performed manual labor under the direction of engineers.

4. In the Middle Ages the methods and devices of work became more efficient. (f)
- During the Middle Ages, advancements in technology and knowledge led to improvements in the methods and tools used by engineers, resulting in increased productivity and efficiency.

5. In the 18th century, the Industrial Revolution began. (b)
- The Industrial Revolution, which started in the 18th century, marked a significant shift in the way engineering and manufacturing were approached, as it introduced new machines and manufacturing processes that transformed various industries.

6. Steam gave man great sources of energy. (h)
- The invention and utilization of steam power during the Industrial Revolution provided humanity with a powerful and widely-available source of energy, which was critical for the development of various engineering and industrial activities.

7. Since the 19th century, both scientific research and its practical application have greatly progressed. (i)
- In the 19th century and beyond, there has been significant progress in scientific research and its practical applications, leading to advancements in engineering knowledge, tools, and technologies.

8. In the 20th century, the mechanical engineer had many new sources of power, such as electricity, gasoline, atomic power, etc. (a)
- In the 20th century, engineers had access to various new sources of power, such as electricity, gasoline, and atomic power, which expanded the possibilities and capabilities of mechanical engineering.

9. The engineer has new and much stronger materials to work with. (d)
- Advances in material science have provided engineers with new and stronger materials, enabling them to design and construct more durable and efficient structures, machines, and devices.