阅读下面的短文,在空白处填入1个适当的单词或括号内单词的正确形式。
Dear Grandpa,
How are you? I am very busy this month. July 6th is my good friend (John) birthday. I want to go to (he) birthday party in the evening. He (need) a cup so I buy one for him. On the 11th, we have strawberry festival. And the 17th, T have a baseball game.
You know I love baseball. On the 24th, I have a' school trip. We don't know where to go we like it. On the 28th, I must (go) to Mr Cool's Clothes Store. The clothes there (be) on sale that day. My sweaters are too small for me and I want (buy) a pair of sports shoes and a T-shirt, too. The (hat) there are very nice, I will buy one for you.
Oh Grandpa, I'm very sorry I can't go to see you with my parents this month. Your telephone number is 586-9353, right? I can (call) you in the evening. See you next month.
Yours,
Frank