11. The longest river in the Commonwealth of independent states is the
A. Irtysh River
B. Ob River
C. Yenisei River
D. Volga River
12. The monsoon climatic regions are
A. South-east Asia including Australia, Africa, America
B. Europe and South America
C. Asia, Africa and Antarctica
D. None of the above
13. The main vegetation of the steppe type climatic regions is
A. evergreen forests
B. evergreen deciduous forests
C. large grasslands
D. coniferous forests
14. The minerals of the sulfide group are
A. Cinnabar
B. Pyrite
C. Galena
D. All of the above
15. The major crude oil markets are the
A. Middle East regions
B. far east regions
C. both (a) and (b)
D. None of the above