该题录音一开始就连续出现时间和数字，而且句子也比较长，这可能给考生 造成压力。解题的关键是在听到这些重要信息时能熟练记下，并保持高度注意力继 续听最后一句中与答题选项直接相关的信息。不过，从应试技巧方面来看，此题并不难。原因是只要应试者在答题过程中（或在录音播放前几秒）能快速扫过选项就 可以在听的时候把注意力集中在与purpose相关的词语上，而不必特别注意与选项 无关的时间和数字。所以，在应试中提前抓紧时间快速浏览选项对减轻心理负担、 排除干扰作用很大，是一个需要训练的重要技巧。

[重点难点]
抓住原录音中The reason was to expose这几个词，并在选项中找到与 expose关联的to reveal这个词。

[录音原文]
The demonetization program, which started in November 2016, removed 86 percent of India's currency in circulation by recalling existing 500 and 1,000 rupee notes and later gradually replacing them with newly printed 500 and 2,000 rupee notes. The reason was to expose the so-called black market, fueled by money that was illegally gained and undeclared for tax purposes.