阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。将答案填写在答题卡的相应位置。
In order to know a foreign language thoroughly, four things are necessary. Firstly, we must understand the language when we hear ____ spoken. Secondly, we must be able to speak it ourselves correctly with ____ (confident) and without hesitation. 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 ____ (grammatical) correct.
There is no easy way to success ____ language learning. ____ good memory is a great help, but it is not enough only ____(memorize) rules from a grammar book. It is not much use learning by heart long lists of words and ____ meanings, 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 advice for those ____ are studying a new language. Practice is important. We must practise speaking and ____(write) the language whenever we can.
