题目内容：

    Agriculture plays an essential role in the rise of the human civilization. Even though agriculture is contributing to employment of a significant part of the population in majority nations, over the years, the percentage of workers has witnessed a steep decline. According to world-wide estimations, not even five percentage of the population in rich nations is employed in the agricultural sector.

Agriculture is still the backbone of the economy in several nations of Africa. According to data released by the World Bank in 2017, the top ten countries where agriculture plays a vital role in employment are in Africa. Burundi, the landlocked nation on the eastern side of the continent, has 91% of its population dependent on it. However, only 15% of the total agricultural production goes to the market. Sweet potatoes, beans, bananas and corn, are some major crops produced on the land.

The second largest employment in agriculture was also registered in an African country； Chad with 87% population working on the field. Other nations which follow on the list are： Somalia, Central African Republic, Malawi, Eritrea, Guinea-Bissau, Democratic Republic of the Congo, Niger, Mauritania, Madagascar and Mozambique. Amid the developing countries of BRICS, it is India where more people are employed by agriculture. The agriculture in India can be traced back to the era of Indus Valley Civilization. By 2017, 43 % of the Indian population is dependent on the agriculture sector for employment.

Meanwhile, many developed countries witness less than 15 percent of their population engaged in the agriculture sector. These nations include Greece, Malaysia, Russia, New Zealand, the United States, the United Kingdom, Germany, Canada, Australia, France, Italy, Japan, Saudi Arabia, South Africa, and many others. At the bottom of the list stand United Arab Emirates , Singapore and Hong Kong, with 0 % of its people employed in agriculture.

1.What does the writer want to highlight in the first paragraph?

A.Agriculture is the foundation of civilization.

B.Agriculture is the main sector of employment.

C.Agriculture is the backbone of the economy.

D.The agricultural population is in sharp decline.

2.Most part of the agricultural produce in Burundi ________.

A.is for family use B.goes to the market

C.is used for export D.goes to the government

3.Where does Central African Republic rank in employment in agriculture in the world?

A.Second. B.Third.

C.Fourth. D.Fifth.

4.We can infer from the text that the larger population in agriculture ________.

A.the more developed the country B.the less developed the economy

C.the more advanced the civilization D.the longer the history of a country