Перепишите, вставьте верное слово (в скобках). 1. Engineering (appears, deals with, extends) machinery of all types.
2. Many kinds of (devices, tool-makers, trends) were invented during the Middle Ages.
3. These methods of work (devise, raise, date back) to very ancient times.
4. Engineers are to (devise, raise, appear) new types of machine-tools and to improve the old ones. 5. Our main task is to (assume, extend, appear) the service life of the device and to (depend, assume, raise) its reliability.
6. Workers at machine building plants (are concerned, depend, erect) with various types of equipment.