根据短文内容和所给汉语提示，写出短文空白处各单词的正确形式。每空限填一词。
At school many things happen to us. We may feel ____ （激动的）when we succeed in a school play. We may feel sorry if we lose an important ____ （比赛）. We want to keep the memory in our lives. How to keep memories? Our teacher, Mr. Smith, has taught us how to____ （记住）things to make our own yearbook. A yearbook is a ____ （种） of book which is used to memory wonderful moments. It’s usually made at the end of year. Last ____ （十二月）, we began to make our yearbook. ____ (首先) we chose the persons that had done something ____ （特殊的）, then some ____ （学生） interviewed them, some ____（写）down their stories, others took photos of them. Finally our teacher helped us to put the things ____ （一起）. Then we had our first yearbook.
元二次方程x2+4x+k=0有实数解，则k的取值范围是（ ）
