1. (2018高二下·扶余期末) 阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。

    I was always told that the three Ps, patience, positive thinking and perseverance, were a sure pathsuccess. But this piece of advice does not always work as planned. My high school math exam is one example. The exam，  was originally to be held in our classroom, (change) to the library at the last minute. This, , didn't bother me because math had always been my strongest subject. I patiently walked to the library, took my seat and took a deep breath to help relax . But my mood quickly changed when I sawfirst question. I had no idea how to do it. I tried to stay positive and preserved I finally found the solution. With the problem (solve), I felt proud of my achievement.  (fortunate), I then notice that I had just 10 minutes left  (complete) the rest.