Decide which word is the odd one out in each of the following groups of words
1. cold, warm, continental, the sky;
2. to adopt, to symbolize, to separate, national emblems;
3. highlands, lakes, rivers, a two-headed eagle;
4. resources, deposits, outskirts, iron ore;
5. population, wealth, people, nationalities
b) Find the names for the groups of words. Fill in each of the spaces
1. highlands, lowlands, mountain chains, grasslands —
2. warm, mild, cold, continental — ...;
3. gas, coal, iron ore, fertile soils — ...;
4. Russian, American, English, Chinese — ...;
5. the Volga, the Yenisei, the Ob, the Lena — ...