阅读下列短文，从所给的四个选项中，选出最佳答案．

　You may think there is only sand in the desert of the world, 　1　 it is not true．In the desert, as we know, there is a little 　2 　, but it is not 　3 　for most plants. Still we can see some plants 　4 　in the desert．

　There is 　5 　in some places in the desert．We 　6 　these places oases(绿洲)．In the oases, there are villages and towns．People grow 　7 　kinds of crops in the fields there．

　People 　8 　live outside the oases．They have camels, sheep and other animals．These animals depend 　9 　the desert plants for their food and do not need 　10 　water．

　The 　11 　are useful to the desert people in many ways．They eat the 　12 　and drink the milk of the animals．They 　13 　the camels for carrying water, food, tents(帐篷)and 　14 　．

　The people of the desert have to keep 　15 　from place to place．They must always look 　16 　grass or desert plants for their animals．When there 　17 　no more food for their animals, they move to 　18 　place．The desert people are 　19 　．No man in the desert would ever refuse 　20 　the people in trouble and give them food and water．

短文填空  先通读下面的短文，然后根据短文内容和所给首字母，在空格内填入一个适当的单词，使短文意思完整。所填单词必须在答题卡标有题号的横线上完整写出。（本大题共10空，每空0.5分，共5分）

　In many countries, people t__________ 1. by car or by bike. They also get from place to place using p__________2.transport such as buses and trains. However, some people live in parts of the world where it is i__________3. to build roads. In these places, animals or other forms of transport have to be used.

　　It is difficult to w__________ 4. in snow but easy to ski over it. So in places like Alaska, people use skis. If they want to go faster, they get dogs to p__________ 5.them on sleds(雪橇). Riding a snowmobile(雪地摩托) is a more m__________6., but expensive way of getting around on snow.

　　In desert(沙漠) like the Sahara in North Africa, people s__________ 7.get around on camels. Camels survive w_________8. in the desert, not because they can s_________9.water in their bodies though! They can survive without water for two weeks and without f__________10.for up to a month. He can only go without water for about three to five days.