What is language for? Some people seem to think it's for practicing grammar rules and earning lists of words—the longer the lists，the better．That's wrong．Language is for the exchange（交流）of ideas and information．It's meaningless knowing all about a language if you can't use it freely．Many students I have met know hundreds of grammar rules, but they can't speak correctly or fluently（流利地）．They are afraid of making mistakes．One shouldn't be afraid of making mistakes when speaking a foreign language．Native speakers make mistakes and break rules, too．Bernard Shaw once wrote, "Foreigners often speak English too correctly．"But the mistakes that native speakers make are different from those that Chinese students make．They're English mistakes in the English language．And if enough native speakers break a rule, it is no longer a rule．What used to be wrong becomes right．People not only make history, they also make language．But a people can only make its own language．It can't make another people's language．So Chinese students of English should pay attention to grammar, but they shouldn't overdo（做过头）it．They should put communication（交际）first.
Language is used to ________.
A. express oneself
B. practise grammar rules
B. talk with foreigners only
D. learn lists of words
Generally, when an American or an Englishman speaks English, he ________.

A．never makes mistakes

B．often makes mistakes

C．can't avoid making mistakes

D．always makes mistakes

"Foreigners often speak English too correctly．"This sentence means that ________.

A．foreigners speak correct English

B．foreigners speak incorrect English

C．foreigners speak English according to the grammar rules

D．foreigners never make mistakes when they speak English