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.