题目内容：

短文改错（共1小题）

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以下作文。文中共有10处错误，每句中最多有两处。错误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(Λ)，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．每处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。（请不要在此处作答，否则不给分）

Have you ever had a headache during a test? Have you ever been too worried about something that you have a headache or even can’t sleep at night? If so, then you know that stress is．

Not all stress is bad for you．Some kinds of stress can help you get things do better, like when you are running towards the finishing line or when you are being asked to give a speech to your class．Stress sometimes can help push you to make full preparation for a test．However, too much stress can result in anger, depression and other related problems, which we need to take serious．

There are many things in our life what might cause stress ------ having too much homework, taking a difficult test, and having economic problems．

It’s impossible to live in a life completely free of stress, so you should learn to deal with stress．The best way reduce stress is to have a balance life．If you get enough sleep, eat properly, take more exercise and have enough fun time, you’ll probably feel less stressed．