英语作文评析,请指出错误,正文如下,好的有追加,

Today,Xiao Ming went to catch frogs; he wanted to catch one and play with it But to his surprise ,he caught many frogs。He went back home quickly and put them into the pot。Then he listened to the radio,the thime of the radio is “Please Protect Frogs” ,it said “Frogs are our friends,please protect them…”At that time ,He was unhappy,he thought he was degrading。Then he took frogs to the river and put them into it。He was happy again。so ,my friends,it's our
duty to protect the nature ,do you think so。