短文填空。
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 f__________ (4) of transport have to be
used.
It is difficult to w__________ (5) 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__________ (6) them on sleds (雪橇). Riding a snowmobile (雪地
摩托) is a more m__________ (7), but expensive way of getting around on snow.
In desert (沙漠) like the Sahara in North Africa, people s__________ (8) get around on camels. Camels
survive w__________ (9) in the desert, not because they can s__________ (10) water in their bodies though!
They can survive without water for two weeks and without f__________ (11) for up to a month.
H__________ (12) can only go without water for about three to five days.