题目内容：

We do morning exercise every day是可数名词
是可数名词,表示“操练” “练习题 ” eg:we do morning exercises every day.

优质解答

We do morning exercise every day.此句中exercise翻译成操练,是不可数名词,我们每天早上都晨练.
We do morning exercises every day.此句中exercise翻译成练习,是可数名词,我们每天都做早上的练习题.