题目

根据每小题所提供的图画情景和提示词，写出一个与图画情景相符的句子。【1】used, seven__________________________________________________________________________________________________________【2】interested, collect__________________________________________________________________________________________________________【3】boy, now__________________________________________________________________________________________________________【4】go, tomorrow_________________________________________________________________________________________________________设圆x2＋y2－4x－5＝0的弦AB的中点为P(3,1)，则直线AB的方程是________________．