你学校广播站开辟了一个“英语天地”栏目，急需一篇 “A frog is our friend”的优秀征文。你作为学校的一名通讯员，请根据下列参考词语展开想像、积极投稿。
参考词语：helpful有益的, catch捕捉, harmful有害的, insects昆虫, protect 保护，take good care of 好好爱护。 (要求：80词左右。)
A frog is our friend
Frogs live in the river. They are good at swimming. In summer, I enjoy listening to them sing. They are my favorite animals. Someone can't stand the sound of their singing, but in fact, they also love frogs. They think frogs a
