如图，一圆柱高8cm，底面半径为 $\frac{6}{\pi }$ cm，一只蚂蚁从点A爬到点B处吃食，要爬行的最短路程是____ cm．

    Hi, everyone! My name is Wang Kai. I'm twelve. I'm in Class 5 Grade 7. Teachers' Day is coming. I want to give some presents to my teachers.

    Miss Zhang is my English teacher. She is twenty-four years old. She likes flowers very much. I want to give her some flowers from my garden. My Chinese teacher has a four-year-old son, Li Xin. He likes playing football a lot. I want to give my Chinese teacher a “special” present: playing football with Li Xin for a day! What about my maths teacher Mr. Zheng? He likes drawing pictures. I would like to draw a picture of him and give it to him.

    My friends, what presents do you usually give to your teachers? Please tell me!