试题题干
WORD FORMATION
Complete the following sentence with the proper form of the word in the bracket.
(fit) 
will help you stay in shape and enjoy your retirement as well.
参考答案
试题解析
此处缺少名词。
will是助动词，空格处缺主语，所以变fit为名词形式fitness，在句中做主语。
句意：健身将帮助你保持身材，并让你享受你的退休生活。