根据短文内容，完成下面的任务。

Dear Grandma,

    How are you? I am very busy this month. (A)September 5th is my good friend Gina's birthday. I will go to her birthday party in the evening. On the eleventh, (B)我有一个英语测试. On September 17th, I have a baseball game. You know I love baseball. On the 24th, I have a school trip. On the 28th, I'll go to Mr. Cool's Clothes Store. The clothes there are on sale that day. I want to buy a pair of sports shoes and a T-shirt. The hats there are very nice. I will buy one ① ________ you. Oh, Grandma, I'm very sorry I can't go to see you ② ________ my parents this month. See you next month.

 Yours,

Eric

根据要求及提示，以 My Sunday为题写一篇短文。

提示：1. 星期天早上七点半起床。

2. 中午和妈妈一起去动物园。

3. 中午短暂休息以后去买东西。

4. 下午和朋友一起去踢足球。

5. 擅长阅读，晚上看《西行漫记》 (Red Star Over China)。

要求：1. 条理清楚，语句通顺，语法正确，书写规范。

2. 提示内容全部体现在文章中。

3. 不少于50个单词。

已知$x,y$为正实数,则 (   )