【Inordertoknowaforeignlanguage（81）___（thorough），fourthingsarenecessary．Firstly，wemustunderstandthelanguagewhenwehear（82）___spoken．Secondly，wemustbeabletospeakitcorrectlywithconfidenceandwithout（83】

　　In order to know a foreign language（81）___ （thorough），four things are necessary．Firstly，we must understand the language when we hear （82）___ spoken．Secondly，we must be able to speak it correctly with confidence and without（83）___ （hesitate）．Thirdly，we must be able to read the language，and fourthly，we must be able to write it．We must be able to make sentences that are grammatically correct．

　　There is no easy way to success （84）___ language learning．（85）___good memory is of great help，but it is not enough only（86）___ （memorize） rules from a grammar book．It is not much use learning by heart a long list of words and their meanings，studying the dictionary and so on．We must learn by using the language．（87）___ we are satisfied with only a few rules we have memorized，we are not really learning the language．"Learn through use"is a good piece of （88）___（advise） for those （89）___ are studying a new language．Practice is important．We must practise speaking and （90）___（write） the language whenever we can．