The differences between cultures are narrowing . The whole world has become a small village . Young people from different countries are becoming more alike . Unfortunately, traditions and customs have no place in their new life style . A pair of jeans , a fast meal and a cool look has become the trade mark of the generation . Throughout the ages , people have fought to keep their identity .However, nowadays teenagers refuse to lead the slow quiet life style of their older generations . Sociologists fear that the day when societies lose their identity is close.

liza bought a lot of Christmas cards to send to her friends and to her husband's friends , and put them on the table in the living room . Then , when her husband came home from work , she said to him ," Her are the Christmas card for your friends , and here are some stamps, a pen and our book of dresses .Will you please write the cards while I am cooking the dinner ?" Mr. Smith did not say anything , but walked out of the living room and went to his study . Mrs. Smith was very angry with him, but did not say anything either .A minute later he came back with a box full of Christmas cards. All of them had dresses and stamps on them already . " These are from last year ; he said laughing." I forget to post them."

Scientists have divided animals into two main groups: with backbones , and those without . We of course ,belong to the group with backbones. This group includes such animals as dogs , cats , mice , horses ,cows lions, elephants , monkeys ,and so on. Fish and birds are also animals with backbones : as are snakes. There are however, a great many animals which have no backbones , such as crab and flies.
Other animals without a backbone live in ponds and sea water,some are so tiny that they can only be seen under a microscope.