Betty told Frank she wanted him to bring a map _____ they could choose the shortest route from the university to her home in Danville.
句意： 贝蒂告诉弗兰克， 她想让他带张地图， 以便他们可以选择从大学到她在丹维尔的家的最短路线。 so that引导结果状语从句， 表示“以便， 为了……”。