根据短文理解，从A、B、C、D四个选项中选择最佳答案填空。
My name is Bill. I am a student in No. 10 Middle School. I am very busy this 1. On June 3rd, we 2 a school trip. I need to buy some food 3 the trip. On June 6th, we have a P.E. test. I am a fat boy, so it is really 4 for me. June 15th is my twelfth 5. I ask my friends to 6 to my party. I need to buy some things for my party in the 7. June 26th is my friend Alan's birthday. I know 8 like(s) ping-pong. I want to buy a ping-pong bat for him. On the last day of June, June 9, my school has a book sale in the school library. I can buy some books at good 10. I hope (希望) I can have a good time this month.
对任意正实数