【题目】假定英语课上老师要求同桌之间交换修改作文，请你修改你同桌写的一下作文。文中共有10处语言错误，每句中最多有两处。每处错误仅涉及一个单词的增加、删除或修改。
增加：在缺词处加一个漏字符号(∧)，并在其下面写出该加的词。
删除：把多余的词用斜线(＼)划掉。
修改：在错的词下划一横线，并在该词下面写出修改后的词。
注意：1．没出错误及其修改均仅限一词；
2．只允许修改10处，多者（从第11处起）不计分。
Nowadays, this is common to hear about a young person getting this or that kind of serious disease. A couple of day ago, a friend in her 20s asked me that I was familiar with some health products. She tells me that during the past two years, she got tired easily and seemed to be in state of sub-health. Twenty is the age in where one should feel filled with strong and energy. And some people at that age have started to worry about their health. Since we now have more access to information about keeping healthy, we should start to act responsible and pay special attention to improve our health.
在线课程【答案】
【解析】此处为it 做形式主语，to hear about a young person。。。为真正主语，不能用this。
A couple of days ago，此句中a couple of 修饰复数。
此处表达朋友问我是否熟悉健康食品。Whether/if 引导宾语从句。
根据语境她告诉我在过去的两年里，她很容易累，看上去处于亚健康。 根据时态一致原则，她是几天前说的，所以用过去式。
此外处于什么状态应该用in a sate of。。。
Twenty is the age in where one should feel filled with strong and energy.此句中age 后跟定语从句，从句缺状语，用where，in多余。
Feel filled with ，with为介词后面应该加名词作宾语，所以用strength，不用strong。
根据语境可知此处表示转折意义，意为但是有些人开始担心自己的健康。
我们应该开始负责任地开始行动起来，修饰动词用副词。
Pay attention to 中to 为介词，所以后用doing。