In order to know a foreign language thoroughly(彻底地), four things are necessary. Firstly, we must understand the language when we hear  ______________ spoken.. Secondly, we must be able to speak it correctly with confidence(自信) and without hesitation(犹豫). ____________ , 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 ____________ language learning. _____________ good memory is of great help, but it is not enough only _____________(memorize) rules from a grammar book. It is not much use learning by heart long list of words and _______________meaning, studying the dictionary and so on. We must learn by using the language. ______________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 ___________(advise) for those ____________are studying a new language. Practice is important. We must practise speaking and ________(write) the language whenever we can.