湛江雅思培训：雅思7 Test1 Reading One18

18.定位词：surprisingly,downward

文中对应点：F段第一句

题目解析：F段首句说：Fortunately-and unexpectedly-the demand for water is not rising as rapidly as some predicted.

F段末句提到：And in a few parts of the world， demand has actually fallen.

这一段的首末句合起来看，正好可以与heading当中的“令人惊奇的下降趋势”相对照，属于很好选择的一题，所以答案是ix。