【正确答案】 C

【答案解析】[听力原文]
According to the best historical records and archaeological findings, it is judged that it took about 800 thousand to 1 million years for the Earth"s population to reach the 250 million total which existed at the end of the first century after Christ. For some time after that, illnesses, lack of food and wars kept the population growth down to less than 1 percent a year so that more than 15 centuries passed before the population reached 500 million. But in the next 250 years, up to 1850, the population of the world shot up to the 1 billion mark, and today it has reached 5 billion. It is said by the United Nations officials that in the next 10 years the population of the world will reach 6 billion by the year 2000.

How large will the world population be at the end of the first century after Christ?

【正确答案】 D

【答案解析】[听力原文]
What result in the decrease of population?

【正确答案】 B

【答案解析】[听力原文]
What is true about the world population of the day?

【正确答案】 D

【答案解析】[听力原文]
How many people are there in the world by the year 2000?