如果我们感觉字数不够，就在每一句或某些句子上添加些词就行了。例如我们感觉上边第二段不够长，就可以这样来加词：
主题句：There are four ways to keep fit.There are four or more ways to keep fit for everyone of us. 从几方面说明： Firstly, we should have our breakfast in the morning. Firstly, we should have our breakfast, such as milk, eggs, bread and so on, in the morning. Second, we should have a nap at noon.Secondly, we should have a short nap, even 30 minutes, at noon. Third, sports exercises are necessary in the afternoon. Thirdly, sports exercises are necessary for everyone and we can do some sports exercises in the afternoon. And fourthly, we could have a pleasant feeling in the evening by listening to both popular and classic music.
这样一来，我们只要保持本句的主题不变，添加一些次要词就能达到字数的规定标准