题目

He accidentally _______ he had quarreled with his wife and that he hadn’t been home for a couple of weeks. A. let out B. took care C. made sure D. made out 答案：A 解析: 此题考查短语动词的辨析。let out“说出，泄漏”；make out“弄明白”；take care“小心”；make sure“确信，确保”。如图，△ABC中边AB的垂直平分线分别交BC、AB于点D、E，AE=3， △ADC的周长为9，则△ABC的周长是A．10B．12 C．15 D．17