【编者按】精品学习网英语四六级频道为大家收集整理了“2012四级听力全题型解析：长对话”供大家参考，希望对大家有所帮助!
做题方式：视听基本一致原则，场景解题原则
视听基本一致的含义是指，听到的原文和看到的选项若基本一致，则选项容易为正确选择。这一点和短对话的原则恰恰相反，请考生一定注意。另外，考生还应注意长对话第一回合句，转折关系以及语调变化等。
例题：
2009年12月四级考试第1篇长对话(部分节选)：
Questions 19 to 22 are based on the conversation you have just heard.
19. A) He prefers the smaller evening classes C) He has to work during the day.
B) He has signed up for a day course. D) He finds the evening course cheaper.
20. A) Learn a computer language. C) Buy some computer software.
B) Learn data processing. D) Buy a few coursebooks.
答案：C B
听力原文(部分节选)：