题目

Columbus College , 241 Queen Elizabeth Drive ,Kowloon City To:     All Staff From:  Jakie Mok , Secretary; Sports Development Committee Date:   May 20, 2010      A week ago , “Sports for Life” programme was sent to the parents, requiring them to select a sport they wanted their child to play. Since then, our staff have received lots of calls from parents asking for more information about it. Here is a memo (备忘录) for your reference when you answer the phones. Sports 1: Basketball.      We expect that this will be the most popular of the four sports. Therefore, students小红按某种规律写出4个方程：①x2+x+2=0；②x2+2x+3=0；③x2+3x+4=0；④x2+4x+5=0．按此规律，第五个方程的两个根为（ ）A．-2、3B．2、-3C．-2、-3D．2、3