You may have noticed that the world’s population is not evenly distributed (分布) around our planet. There are more countries where people seem to be living nearly on top of  each other because conditions are overcrowded . Then there are others where it seems that hardly anybody lives. What influences this unequal distribution of people ? There are specific advantages and disadvantages of living in a certain area.
The two main factors (因素) that influence people’s choice of location are climate and resources. Climate is the usual weather conditions in a region. Areas that have bad weather are generally less ideal as places to live in . The north and south poles at the top and bottom of the world may be beautiful in their rugged, natural way , but the disadvantage of the bitterly cold and windy conditions usually keeps people away. When it comes to climates, warm conditions and a normal amount of rainfall are advantages that attract people.
Natural resources are tings that we get from nature that help us survive. Each region offers different resources, and therefore attracts different groups of people. People who enjoy the beach can make their living by catching and selling the ocean’s many fish and other sea creature. Those who prefer farming can take advantage of rich soil in valleys near rivers. Some people are willing to accept the disadvantages of the terrible conditions of deserts or mountains in order to take advantages of the resources like oil or woods.
The underlined part “on top of ” in the first paragraph most likely means            .

A．very close to	B．on the highest part of
C．in control of	D．on the surface of

What are the main factors that influence the distribution of people ?

A．Resources and oceans.	B．Climate and rivers.
C．Climate and resources.	D．Warm conditions and rainfall.

The writer thinks many people don’t live near the north or south pole because         .

A．they can’t get enough food there

B．the natural sights there don’t arrract people

C．the unpleasant weather keeps them away

D．the length of nighttime keeps them away

Why do people go and live in valleys near rives ?

A．The temperature isn’t too low in winter.

B．The resources like oil can bring them much money.

C．People can make their living by catching and selling fish.

D．It’s easier for people to grow plants or keep animals.

The purpose of the examples in the last paragraph is to tell us

A．people cannot survive in cold conditions.

B．different resources attract different groups of people.

C．people usually prefer living at the seaside to living mountains.

D．a normal amount of rainfall is necessary for people to live in the desert.