用动词过去式和名词复数形式写一篇短文 至少10句至少10句话

Yesterday,I went to the zoo with my classmates.There were many animals being raised in it.The tigers were locked in the cages,because people think they may be dangerous for people visiting the zoo.But I thought they were yery poor,because they should live in the nature,not in the cages.and I alse saw some monkeys,who are more free and happier than the tigers.there are alse some birds,but i did not know their names,but they are very beautiful and they sung very beautifully.