试题题干
Word Formation
Complete the following sentence with the proper form of the word in the bracket.
(time) The recent outbreaks of the flu are a 
reminder that this disease is still a serious health hazard.
参考答案
试题解析
此处缺少形容词。
a是冠词，reminder是名词，形容词修饰名词，所以空格处填形容词。所以变time为timely。
句意：最近爆发的流感是一个及时的提醒，提醒人们这种疾病仍然是对健康有危害的。