Asyoumayknow,thereareover6billion(十亿)peopleonearth.WepassedthesixbillionmarkonOctober12th,1999!Herewehaveafewointerestingfacts.Accordingtosomescientists,theworld'spopulationwillr7billionin

Question

　　As you may know, there are over 6 billion(十亿) people on earth. We passed the six billion mark on October 12th, 1999! Here we have a few o____interesting facts.
　　According to some scientists, the world's population will r____7 billion in 2012, and 9 billion in 2050.
　　The world's birthrate(出生率) is h____than the death rate. Every second five people are born and two people die. But we can't keep going a____that rate. Scientists think it'll take us another 120 years to double our population.
　　The Vatican(梵蒂冈) has the s____population in the world: only about 900 people in the country.
　　Africa's population is the fastest-growing in the world.
　　More than one in e____four people in the world are youths. Nearly 70% of youths live in developing countries. In these countries, the number of youths will c____to increase(增长) for another 30 years.

Answer 1

【分析】1. 我们这儿有其他一些有趣的实情。other 其他的。
2. 据一些科学家预测，世界人口将在2012年达到70亿，在2050年达到90亿。reach 达到。
3. 世界人口的出生率比死亡率高。由than可知用比较级。
4. 但是我们不能继续保持那样的比率。“以……比率”用介词at。
5. 由only about 900 people in the country可知，梵蒂冈拥有世界上最少的人口。the后接形容词最高级，修饰population用small。
6. one in every four people 每四个人中的一个。
7. continue to do sth. 继续做某事。在这些国家，年轻人的数量将会持续增长30年。