题目

第二节        阅读下面短文，从短文后所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。 One sunny afternoon, a seven-year-old girl went for a walk. She crossed a large area of grassland into the woods __36__ she realized that she was lost. Sitting on a rock and __37__ what to do, she began crying. After a while, She __38__ to walk along a wide path lined with tall trees and thick bushes. __39__ it was getting dark, she saw a small, dark wooden house. She opened the door and __40__ stepped in. 已知，反比例函数y=12x和一次函数y=kx-7都经过P（m，2），求这个一次函数的解析式．