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  3. 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 o

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 o

admin2010-01-18  2
问题    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 years.
Experts have long                                               【M1】_____
been concerned about such a growth. Where will we fred the food,
water, works, houses, schools                                   【M2】_____
and health care for all these people? A major news tudy 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  【M3】_____
generally are smaller now than they were a few years ago.
It is happened in both developing and                           【M4】_____
industrial nations. 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 prevent          【M5】_____
and delay pregnancy. More women are going to
school or working at jobs away from home                        【M6】_____
instead having children. And more governments,
especially in developing nations, now                           【M7】_____
support family planned programs to reduce population growth.
China is one of the nations                                     【M8】_____
that has made great program in reducing its population growth.
China has already cut                                           【M9】_____
off its rate of population growth by about one half since 1970. 【M10】_____
【M3】
选项
答案have改成has
解析 主语是单数。
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