Decide which answer best fits each space.
The world’s population (1) five-billion mark in 1987 and it is increasing (2) about 1.7 % a year. At this rate of growth, the number of people in the world will double every 41 years. This rapid increase has been called the (3) explosion. No one knows how many people the Earth can (4) . Many scientists believe that the world will soon become (5) , that is, it will have more people than it can support. When too many people (6) in a small place, life can become very difficult and (7) . In some places, there are so many people that there is not enough food or houses for everyone. Many families move to the cities, (8) to find work and homes. So more homes need to be (9) . The city spreads over more and more farming land. As the world’s population (10) , there is less and less land left for agriculture to feed all .the people.
Giải thích
The correct answer
The world’s population (1) five-billion mark in 1987 and it is increasing (2) about 1.7 % a year. At this rate of growth, the number of people in the world will double every 41 years. This rapid increase has been called the (3) explosion. No one knows how many people the Earth can (4) . Many scientists believe that the world will soon become (5) , that is, it will have more people than it can support. When too many people (6) in a small place, life can become very difficult and (7) . In some places, there are so many people that there is not enough food or houses for everyone. Many families move to the cities, (8) to find work and homes. So more homes need to be (9) . The city spreads over more and more farming land. As the world’s population (10) , there is less and less land left for agriculture to feed all .the people.
passed
by
population
support
overpopulated
live
unpleasant
hoping
built
grows