题目

 She is looking forward to __________ to No. 1 High School to study.        A. going          B. go                C. goes    答案：  A    （2006•扬州）如图，已知⊙O过正方形ABCD的顶点A、B，且与CD边相切，若正方形的边长为2，则圆的半径为（ ）A．B．C．D．1