填空题

The world’s population continues to grow. There now are about 4 billion of us on
earth. That could reach 6 billion by the end of the century and 11 billion in a farther 75 (1)______
years. Experts have long been concerned about such a growth. Where will we find the
food, water, works, houses, schools and health care for all these people A major new (2)______
study shows that the situation may be changing. A large and rapid drop in the world’s
birth rate have taken place during the past 10 years. Families generally are smaller now (3)______
than they were a few years ago. It is happened in both developing and industrial nations. (4)______
Researchers said they found a number of reasons for this. More men and women are
waiting more longer to get married and are using birth control devices and methods to (5)______
prevent and delay pregnancy. More women are going to school or working at jobs away (6)______
from home instead having children. And more governments, especially in developing (7)______
nations, now support family planned programs to reduce population growth. (8)______
China is one of the nations that has made great program in reducing its population (9)______
growth. China has already cut off its rate of population growth by about one half (10)______
since 1970.