| 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 another 75 years. Experts long have
been concerned about such growth Where will we find the food, water, jobs,
houses, schools and health care for all these people A major new study shows that the situation may be changing. A large and rapid drop in the world’s birth rate has taken place during the past 10 years. Families generally are smaller now than they were a few years ago. It is happening in both developing and industrial nations, Researchers said they found a number of reasons for this. More men and women are waiting longer to get married and are using birth control devices and methods to prevent or delay pregnancy. More women are going to school or working at jobs away from their home A. worried about B. related to C. engaged in D. made a study of [填空题]Fifty years from now the world’s population will be declining, with no end in{{U}} (36) {{/U}}.Several centuries from now, unless people’s values changes{{U}} (37) {{/U}}, there could be fewer people living in the entire world than live in the United States today. The big{{U}} (38) {{/U}}of the past twenty years is that in not one country did fertility stop falling when it reached the{{U}} (39) {{/U}}rate -- 2.1 children per women. In Italy, for example, the rate has{{U}} (40) {{/U}}to 1.2. In Western Europe as a whole and in Japan it is down to 1.5. The evidence now{{U}} (41) {{/U}}that within fifty years or so world population will{{U}} (42) {{/U}}at about eight billion before starting a{{U}} (43) {{/U}}rapid decline. That has really posed a great deal of anxiety.{{U}} (44) {{/U}}, many people still fear that it will keep "exploding" until there are too many people for the earth to support. But{{U}} (45) {{/U}}. World population was growing by two percent a year in the 1960s; the r
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