短文改错（共10小题；每小题1分，满分10分）
下面短文中有10处语言错误。请在有错误的地方增加、删除或修改某个单词。
增加：在缺词处加一个漏字符号（∧），并在下面加上该加的词。
删除：把多余的词用斜线（\）划掉。
修改：在错的词下划一横线，并在该词下面写上修改后的词。
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。
I always wanted to be great scientist. I had a dream of discovering a new drug that would save hundreds of people’s life. Unfortunately, I was never very well at chemistry at school and the teacher was used to get angry with me. I decided to becoming an inventor and designed an amazing new product. My parents were encouraging, but told me to be a few more realistic. A few weeks late, I had an idea of designing a pen to write in water. In my disappointment, a friend of me pointed out that it was not a new invention.