Listen to the passage and then answer the questions.

1. What is the problem the earth faces?
The population is increasing very quickly.
2.People can live on the seven continents. (F)(判断正误)

3.How much of the world is covered with land?
One third .

4. What is largest part of the ocean ?
The Pacific Ocean.

the world's population was over 7 billion in total.世界上人口总计已超过70亿。
(1) population意为“人口”，常被看作是一个整体，一般不加s。作主语时，谓语动词要用单数形式。
如:
The population of Germany is about 81,000,000.德国大约有八千一百万人口。

(2)表示“.....的人口”可用“the population of+地名”，也可用“the population in +地名”，作主语中心词时,谓语动词用单数形式。如:
The population of Canada is about 30,000,000.加拿大的人口是三千万。
表示某国、某城市有多少人口时，还可用.….has apopulation of ...结构。如:
The city has a population of 30,000.那座城市有三万人