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!

稀：A、事物中间的距离，空隙大。B、含水多；稀薄（跟；“稠”相对）。C、事物出现得少。

①这里蕴藏着许多稀有金属。____

②这片地的棉花种的太稀了。____

③这碗粥真稀，李敏连喝了三碗。____

一列动车在高速铁路上行驶的时间和路程如图．看图填写如表：

①   这列动车行驶的时间和路程成____比例

②照这样的速度，行1800千米需要____小时．