A：HBr
B：CaO
C：H2
D：Hg
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.
计算（﹣3）×（﹣1）2的结果等于（ ）
