英语译林牛津版必修1Unit1同步完形填空选编（2）及答案
完形填空(共20小题；每小题1.5分，满分30分)
阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。
There are about fifteen hundred languages in the world.But only a few of them are very __36__.English is one of them.Many people __37__ it，not only in England and the USA，but in other parts of the world.About 20 million speak it __38__ their native language.It is difficult to say how many people are learning it as a __39__
