14、 Motorcyclists usually wear dark colors because_________

• A、A. they want to be respectable 

• B、B. they want to be impressive

• C、C.the colors look different

• D、D. the colors suit their sport

51. 某英文报社正在举行题为“fight against haze（雾霾）”的征文活 动。请你就此题目写一篇英文短文应征，内容包括：•雾霾会造成哪些危害 •我们可以采取哪些对措施

Natural Resources

    Throughout history, people have often selected where they want to live based on the natural resources that are available in the area. 26 Some of these resources include water, food sources such as fruits and vegetables, and animals that can be caught or hunted.

    A region’s natural resources determine the way of life of its people. 27 |On the other hand，poor soil will either send people looking for better places, or attract people with other purposes for the land, such as setting up businesses or factories.

    28 People who wish to make a living as fishermen can do so by the ocean, but cannot do so in the desert. Desert people have many traditional and unique foods, which cannot be found in the forest. Each area attracts people based on their interests and purposes.

    Areas that have rich water resources will naturally have more people, traditionally, villages，towns and cities built near water have been the most successful. People there are able to use the water resources to meet their daily needs. 29 Places that are hard to reach，such as high mountains or dry deserts, will have fewer people living in them.

30 For too long, people have destroyed natural resources, using up those resources that cannot be easily replaced. On the earth, we are lucky to have many resources that are renewable, such as sun, wind, water, and trees. As more and more focus is placed on the use of renewable resources, it will become easier to protect our planet from further harm.

A．It  is  easy to find new resources in nature.

B.Renewable resources are those that can be replaced easily.

C.While you may not think of oceans as natural resources, they are.

D.for example, regions with rich soil can support fanning societies.

E.They can also use the water to help them move goods to other areas.

F.Natural resources are useful to people, and they come from the earth.