.. take a lot of exercise...
【精析】 take exercise“做运动”。exercise 作“练习”讲时，是可数名词；当“运动”讲时，是不可数名词。（但是注意：do morning/eye exercises中的exercises。）
【练习】 单词拼写
1. My mother takes ________ (运动) every day to stay fit.
2. He is taking lots of ________ (运动) to take part in the Olympics.
