小题1:B
小题2:D
小题3:C
小题4:D
试题分析：本文讲述的是在外语学习方面要注意的不同的问题，以及学习语言最后的方法就是用。
小题1:B 细节题。根据文章第一段Firstly, we must understand the language when we hear it spoken. secondly, we must be able to speak it ourselves, with confidence(自信) and without hesitation(犹豫). Thirdly, we must do much reading. Finally, we must be able to write it. We must be able to make sentences that are correct in grammar.可知学习关于听，说，读，写四个方面。故B正确。
小题2:D 推理题。根据文章第二段We must learn by using the language. If we are pleased with a few rules we have memorized, we are not really learning the language. We must "learn through use". Practice is important. We must practice speaking and writing the language whenever we can.可知使用是学习语言最重要的方法，故D项正确。
小题3:C 细节题。根据文章最后2句We must "learn through use". Practice is important. We must practice speaking and writing the language whenever we can.可知练习和使用是最有效的方法，故C正确。
小题4:D 推理题。根据文章最后3行If we are pleased with a few rules we have memorized, we are not really learning the language. We must "learn through use". Practice is important. We must practice speaking and writing the language whenever we can可知"learn through use"有两方面的含义：通过使用来学习，学习的目的也是为了使用。故D项正确。
点评：本文讲述的是学习语言的方法。文章基本上是考查细节题，对此类题型考生可以首先从问题中找到关键词，然后以此为线索，运用略读及查阅的技巧在文中迅速寻找这一细节，找到后再把这一部分内容仔细阅读一遍，仔细比较所给选项与文中细节的细微区别，在准确理解细节的前提下，最后确定最佳答案。