Doing_______every day is good for our health.请问里面是填exercise还是exercises呢？
B. 该题考查的用法，既是动词（意思为：锻炼），又是名词，当“锻炼”讲时是不可数名词，当“作早操或保健操”讲时是可数名词。故选B。
Exercising v.锻炼，训练，练习( exercise的现在分词 )；锻炼（身体某部位）；使焦虑；发挥（作用）
1.exercise 作可数名词表示“练习题”常用复数。2.exercise作不可数名词表示“锻炼，运动，做操”
根据本题意思：
每天做操对于我们的身体健康是很有好处的
所以表示做操，用exercise作不可数名词
即Doing exercise every day is good for our health.
希望回答对你有帮助
exercise作锻炼不可数
Exercise为"练习,锻炼"
当为"锻炼"时,如:"do exercise"不加”S”←←←
当为”练习”时，如：”eye exercises,math exercises”加”S”
exercise
exercises
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