Well, my group has been doing a project on how household waste is recycled in Britain.We were quite shocked to discover that only 9% of people here in the UK make an effort to recycle their household waste. This is a lower figure than in most other European countries, and needs to increase dramatically in the next few years if the government is going to meet its recycling targets. Theagreed targets for the UK mean that by 2008 we must reduce our carbon dioxide emissions by 12.5%, compared with 1990. And recycling can help to achieve that goal, in two main ways: the production of recycled glass and paper uses much less energy than producing them from virgin materials, and also recycling reduces greenhouse gas emissions from landfill sites and incineration plants. As part of our project, we carried out a survey of people in the street, and the thing that came up over and over again is that people don’t think it’s easy enough to recycle their waste. One problem is that there aren’t enough ‘drop-off’ sites, that is, the places where the public are supposed to take their waste. Wealso discovered that waste that’s collected from householders is taken to places called ‘bring banks’, for sorting and baling into loads.（216单词 剑桥真题C5）

这段内容读完用时1分15秒

简单的公式：（1分15秒-2分12秒）/2分12秒=43%。也就是雅思的听力语速比四六级的语速快了43%。四六级的学生听了雅思听力感觉是rap，而雅思的学生听四六级等于0.5倍速的听力播放，就像年轻人听京剧，语速太慢。

2.话题，也就是场景词汇（以下按照听力场景词汇的频率排序）

所以我们可以很明确的发现，雅思的场景词汇与四六级的词汇有很大的重叠性。

事实上，一般四六级的词汇量要求在4000-6000词，而雅思的词汇要求9000-10000词。

同时，我们也发现雅思的场景基本覆盖了学生生活的方方面面，不仅仅是学习，更希望的学生可以在国外完整的生存下来，甚至是就业。所以即使将来学生选择不出国，在国内就业，雅思的词汇也绝对不会出现“白背”的情况。

3. 语言能力

语言能力延伸的三个阶段：input, knowledge, output 分别对应到大部分学生的英语学习轨迹时，就应该是：

很多人在进行语言习得的时候，都会遇到一个问题：我到底要输入什么内容？是按照所谓中学英语，高考英语来进行的吗？其实不然。在“语言暴露”中的核心要素，就是语言表达的多样性和准确性。