Noon exercise classes have become a popular way for white collar workers__________in shape．

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问题 Noon exercise classes have become a popular way for white collar workers__________in shape．

选项 A、to stav
B、stay
C、stayed
D、to staying

答案A

解析 Noon exercise classes have beeome a popular way for white collar workersto stay in shape．中午上运动课已经成为一种受到上班族欢迎、保持身体健康的方法。不定式短语to stay in shape做形容词用，修饰前面的名词way。a way to V．表“……的方法”。
collar