根据上下文的语法结构及所给提示填空,使短文连贯通顺。
People ____ (live) in different countries made different kinds of words. Today there are about fifteen hundred __
_(language) in the world. Each contains many thousands of words. A very large dictionary, for example, contains four _
__five hundred thousand words. But we do not need _
_ these. To read short stories you need to know only about two thousand words. __
__ you leave school, you will learn only one thousand or more. The words you know are called your vocabulary. You should try to make your vocabulary __
__ (big). Read as many books as we can. There are a lot of books _
__ (write) in easy English. You will enjoy them. When you meet __
__ new word, look it __
__ in your dictionary. Your dictionary is your __
(much) useful book.