完成下列各题

The people who lives in the far North are called Eskimos(爱斯基摩人)．In the world of ice and snow it is 21 to grow plants for food．The Eskimos must hunt and fish during the whole year to 22themselves and their families with food．In winter，they hunt the seal(海豹) 23 the polar(极地的)bear．When they hunt the seal，they 24 a hole in the ice and try to 25 the seal when it comes up to breathe．

In summer，the Eskimos hunt 26 animals。and they also hunt birds and catch fish．27 that is useful is saved．The Eskimos use the meat from animals for food．They melt(融化)the fat from their bodies and use the 28 as fuel(燃料)．They make tools out of animals bones．The skin and furs of animals are used for making clothing．

If an Eskimo is 29 lucky，he may kill a whale(鲸鱼)，30 a dead whale may wash up on the shore near his house．The whale is an especially useful animal，because it gives a great 31 of oil．

There is 32 wood at all where the Eskimos live．Eskimos 33 all their wood from the sea．Sometimes floating wood from places．farther south washes up on the shore．

Most Eskimo houses are 34 of stones．Instead of a door，there is a long，low tunnel (地道) 35 into the house．People have to crawl(爬)through the tunnel in order to enter the house．