问题
选择题
We are now short fresh water. Something must be done to prevent people polluting it.
A. of；from B. for；from C. of；to
答案
答案：A
题目分析：句意:我们现在缺乏新鲜的水。必须做点什么来防止人们污染它。第一个空是一个固定的短语，be short of 短缺……；第二个空也是一个句型，prevent sb. from doing sth. 意为：阻止某人做某事。故选A。