题目

已知P(-1,2)为圆  内一定点，过点P且被圆所截得的弦最短的直线方程为  (  ）A.2x-y+5=0       B.x+2y-5=0       C.x-2y+5=0       D. x-2y-5=0 答案：A-----Have you _____ everything ready for the meeting? ----- Not yet, we need ______. A. got; another three chairs 　 　 B. got; more three chars C. prepared; other three chairs 　 D. prepared; three another chairs