短文改错（共10题，每题1分，共10分）
下文中共有10处错误，每句最多两处，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：删除多余的词用斜线（\）划掉。
修改：在错的词下画横线，并在该词下面写出修改后的词。
注意：1. 每处错误及其修改仅限一词；2. 只允许修改10处，从11处起不计分。
Success depends on many factors, both physical and spiritual. In my opinion, mental factors like a strong will is far more decisive in enabling us achieve success.
Otherwise, we must apply our strong willpower and perseverance when face with challenges. Three years ago I was proud to be admitted to a key middle school, but soon I found everything is different from that I had expected. Hard although I studied, I still fell behind. However, I kept on trying persistently searching for the suitable learning methods. Eventual, my studies improved little by little.
In a word, where there is will, there is a way. Only by making up strong-willed efforts can we overcome all obstacles lie on our way to success and maximize our potential and gain competitive strengths.