短文改错（共10小题；每小题1分，满分10分）
文中共有10处语言错误，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（∧），并在其下面写出该加的词。
删除：把多余的词作斜线（\）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。
My mother is a teacher work in a key high school. She is too busy that she often has to get up early and stay up late. In addition to this, she hardly has any time to take exercises. She has been on poor health for some time. My father and I are worried that she may fall ill if she works too hard. These days I’m thinking why to develop my mother’s interest in playing sports. Considered that today is Mother’s Day, I decided buy a pair of jogging shoes for her. I secretly put them on the desk in her study. When my mother entered into her study this evening, she looked surprised, but she immediate realized my purpose. She promises that she would go jogging every evening.