Ex. 1. Choose the right word from the ones given in brackets:
1. Engineering (appears, deals with, extends) machinery of all types.
2. Theoretical research (depends, erects, assumes) on experimental data.
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. 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 machinebuilding plants (are concerned, depend, erect) with
various types of equipment.
7. Many kinds of (devices, tool-makers, trends) were invented during the
Middle Ages.