过A（-3，0）和B（3，0）两点的所有圆中面积最小的圆的方程为______．

根据句意和汉语提示写出单词，完成句子。

小题1:My father’s ___________birthday is coming ,I will buy him a present . (四十九)

小题2:There is a long river _______________ our city. (穿过)

小题3:He is a teacher and his sister is a _________. (警察)

小题4:When I heard the bad news, I felt even _________. (伤心)

小题5:During the Spring Festival ,all of us have good __________. (心情)