Слайд 2Phraseological units may come from the following spheres :
1. From engineering and

technology
Ex:to let off steam
Слайд 3 Ex:to put the plough before the oxen
2. From agro-cultural

Ex:to put the plough before the oxen
Слайд 43. from sea-travelling business
Ex:to be in low waters

Слайд 54. from trade and commerce
Ex: into bargain

Слайд 6National customs and traditions
Ex: by hook or by crook

Слайд 7from the words of Greek and Latin classics, from the Bible and

from myths and legends
Ex: the apple of discord