问题描述： do exercise 加s么? 1个回答 分类：英语 2014-10-03 问题解答： 我来补答 exercise作练习讲时是可数名词,作锻炼讲时是不可数.We have many exercises to do every day.可数 We do morning exercise every morning.不可数 展开全文阅读
