读短文，选词填空。

Last Sunday our teacher us to the park. We with our bags. My bag was big but light (轻的). It was easy for me to carry. Amy's bag was and than mine. And there is some nice food in it. So she could not carry it. I was two years than Amy. And I was too. So I helped her carry the bag. Sometimes we had a rest. She her food to me to eat. The bag was than before. And it was for me to carry. We saw many beautiful flowers and cute birds. We were very .