阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填人一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卷为16-25的相应位置上。
Many accidents happened in our daily life, including the traffic, drowning, stampeding and so on, which caused many disasters. As a result,  16   ( person) safety lessons are very necessary.
Actually, more and more accidents took place around us,    17   (make) our personal safety under threat. Therefore, personal safety should be the priority to the students.
Having read the report    18  accidents that happened in China, I instantly think of the accident    19  occurred to me ten years ago. Like other naughty boys, I like doing sports, especially swimming.  It was a hot summer noon. I went out to swim with    20   neighbor without parents’ permission. Happy as we were, we even tried having a    21   (compete) to see who could swim     22  (fast) and farthest. In order to show my ability of swimming, I spared no effort to swim. I did not realize that I had no other strength left    23  I reach the middle of the river. I and my body was sinking into   24  bottom of the river.    25  , (fortune) with the help of my friends, I had a narrow escape. What an unforgettable experience! It was my showing off that caused the unnecessary accident.
This case is only one among several hundred terrible accidents that take place around us every day. It is high time that we realized the importance of personal safety. And only with a good sense of personal safety can we live a safe and happy life!