阅读理解，根据课文信息，写出括号内单词的正确形式。

Dear Amy,

    My name is Zhang Yuxiao. I'm a pupil. I （go） to the park last Sunday. I （see） some birds. They （sing） beautifully. I （eat）some food and （drink） some colas.  It was fun. I had a good time last Sunday.