急,英语作文,假设你是李华,上周日去动物园,看到游客对动物乱扔石子甚至往一头熊头上泼水,对此你感到非常气愤,现在请你用英

Dear sir/madam
Last Sunday,my sister and I paid a visit to the GuangMing zoo .There were so many animals in it,We pandas,tigers ,monkeys,elephants and so on,but when we walked to the monkey cage,we saw a visitor was throwing snacks(food) to the monkeys,I was so angry and worried about animals in the zoo.So protecting animals is very important.We must take measures to stop animals from being hurt and killed.
Your sincerely
Li hua