靠前个是做体育运动，不可数但如果加个定语的话，像do morning exercises 或 do eyes exercises第二个是做数学题do exercise = take exercise 锻炼.此处exercise不可数do exercises 做练习或做操, 此处exercise为可数,复数。
靠前个是做体育运动，不可数但如果加个定语的话，像do morning exercises 或 do eyes exercises第二个是做数学题do exercise = take exercise 锻炼.此处exercise不可数do exercises 做练习或做操, 此处exercise为可数,复数。
