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Read the passage and choose the best answer for each question :
Different regions have different rates of population growth , but in the 20th century , the world saw the biggest increase in its population in human history due to medical advances and massive increase in agricultural productivity made by the Green Revolution .
However , in some countries there is a negative population growth , especially in the Central and Eastern Europe , mainly due to follow fertility rate , and Southern Africa due to the high number of HIV - related deaths . Within the next decades , Japan and some countries in Western Europe are also expected to encounter a negative population growth due to sub - replacement fertility rates .
Population growth which exceeds the carrying capacity of an area will result in overpopulation . On the contrary , such areas may be considered " under - populated " if the population is not large enough to maintain an economic system .
1. Which sentence is NOT true ?
a. Most of the countries in the world are facing the problem of overpopulation
b. Overpopulation is a state when the population growth exceeds the carrying capacity of an area
c. The Green Revolution caused the population explosion in the 20th century
d. The 20th century had the highest population growth rate in the history
2. When is an area considered " under - populated ? "
a. When its population is not big enough to maintain the economic system
b. When it has high number of HIV - related deaths
c. When its population is too poor
d. When it has high fertility rate
3. Which areas are expected to encounter a decrease in population growth in the next decades ?
a. Some countries in Central and Eastern Europe
b. Japan
c. Some countries in Western Europe
d. B and C
4. Negative population growth in Central and Eastern Europe is due to : ................
a. high fertility
b. low fertility rate
c. low death rate
d. high number of HIV - related deaths
5. What does " fertility rate " mean ?
a. birth rate
b. death rate
c. growth rate
d. marriage rate
populous
distribution
approximately
environmental
explosion
36. populous
37. distribution
38. approximately
39. environmental
40. explosion