Do you like sports? Do you play basketball or baseball in your P.E. class or after school?

    My sister and I like sports very much. (A) We are in our school tennis club__俱乐部）.We play tennis in the morning. It's very interesting. First, we do some exercises(热身练习）.Then, the teacher teaches tennis. We watch him carefully. Later, we play in pairs. Some boys can play very well，but we can't. They often come to help  us. Our teacher is glad to see this. He says our school has many clubs. “Do you like sports?” “Yes，we do, we answer.

    Sports are really fun, and they are good for us.

根据短文内容完成下列任务。

设向东为正方向，有一辆汽车以15m/s的速度从东向西匀速行驶，则汽车运动的位移与时间的关系图象可能是图中的（　　）

扩句

①枝叶展开。

②小蝌蚪游着。