题目

—Oh, I’m really sorry to hear that Yang Hao was the last to pass the finishing line.           --   he failed, he tried his best.           A. As if      B. In order that      C. Even though  D. As long as 答案：C一次函数y=x+5的图象经过点P（a，b）和Q（c，d），则a（c-d）-b（c-d）的值为A.9B.-16C.25D.-25．