试题题干
WORD FORMATION
Complete the following sentence with the proper form of the word in the bracket.
(danger) Believe it or not, there can be no doubt whatsoever that smoking 
your health.
参考答案
试题解析
smoking后缺谓语动词，而且谓语动词要用第三人称单数。所以变形容词danger为动词endanger，再加s表示第三人称单数。
句意：信不信由你，毫无疑问，吸烟危害你的健康。