语法填空。阅读下面短文，在空格处填入一个适当的词, 或使用括号中所给单词的正确形式（每空不多于3个单词）。
It was a playground. Eight ____(child) were standing on the starting line to take part in a running race.
Ready? Bang!
All eight girls started running ____ they heard the sound. After a minute, one of the small girls fell down. Because ____the pain(痛), she started to cry. When the other seven girls heard, they stopped running ____(quick).Then they stood for a while to see what happened. They decided ____(run) back to the place where the girl fell down. One of them kissed the girl and told ____ to be strong. They said, “We will be together ____ you.” Then, seven girls helped the fallen girl stand up and looked after her carefully. The eight girls joined hands together, walked together and ____(get) to the winning line. People were moved. Clapping(掌声) of ____(hundred) of people came out. Though they lost the race, they were all ____best runners!
All these special girls are strong and brave. What did they teach this world？Teamwork! Friendship! Love!：
为“智力之花”，人体中缺少或含量过多都会导致甲状腺疾病，这种元素是
