People living in different countries made different kinds of words．Today there are about fifteen hundred l__________ in the world．Each contains(包含)many thousands of w__________．A very large dictionary，for e__________，contains four or five hundred thousand words．But we do not n__________ all these．To read short stories you need to know only about two thousand Words．Before you l__________ school，you will learn only one thousand or more．

The words you know are c_________ your vocabulary(词汇量)．You should try to enlarge(扩大) your vocabulary．Read as many books as you c_________. There are a lot of books W_________ in easy English for you to read．You will enjoy them．When you meet a n_________ word，find it in your dictionary．Your dictionary is your most u_________ book．