拿到passage后，我们在做任何分析之前，需要梳理题目本身的逻辑思路（也就是作者的逻辑思路）。就这个passage本身的思路，我们做出如下的梳理：

1）作者首先明确一个事实： Erosion of beach sand 导致恶果：a serious threat to our island and our tourist industry。

2）于是，作者意图 ：stop the erosion。

那么，作者的具体的办法是：charge people for using the beaches。并且，从这里开始了一个逻辑链：

*步：charge people for using the beaches （收费筹钱），è replenishing the sand （有钱补沙）。这一步动作基于的理由是：this solution may annoy a few tourists in the short term。

* 这一步得到的结果：help protect buildings along our shores （补沙护楼）è reducing these buildings' risk of additional damage from severe storms （降低严重的暴风雨对楼的损害的风险）。作者认为可以得到这个理想的结果的理由是：replenishing the sand was done to protect buildings on the nearby island of Batia.

* 最后会得到的结果是：tourist industry will improve over the long term (沙滩和楼好了，旅游业就长期的好了)。

3）至此，作者的逻辑闭环形成。

只有当我们搞清楚passage的作者的思路的时候，才有可能仔细检查每一个环节以及发现其中的问题：

以下是针对步“收费筹钱”写出的分析示范段落：

The author recommends the charge for using the beaches based on an opinion that the charge would annoy a small number of tourists in the short term. However, this opinion is not evidenced and therefore may prove wrong. The author neither specifies the amount of fee that would be charged nor provides information about how much money tourists would like to pay. In addition, there is no information concerning whether tourists who would accept the charge initially would later change their mind. The lack of these three crucial pieces of evidence renders dubious the author’s opinion about the effect of the fee. In other words, Tria may lose a considerable number of tourists for a long time or even forever, and as a result, the money to replenish the sand may not be successfully raised as planned. 

看完之后，大家可以再次对照上面的中文分析学习领会。