题目

As soon as the children were _____, their mother got them out of bed and into the bathroom.    A. woke                    B. waken                    C. wake                    D. awake 答案：  D. awake 解析: awake adj.醒着的 (作表语) 。Awake, awaken, wake, waken都可以作及物和不及物动词用, 但是awake多用作不及物动词, 其中wake最常用。10．如图，PA、PB是⊙O的一条折弦，C是AB弧的中点，CD是⊙O的直径，CE⊥PA于E，求证：PD2-AD2=PA•PB．