题目

—Have you heard that George quit his job? —Yeah, but I can't ________why he did so. A. put out  B．figure out C. carry out  D. send out 答案：B 考查动词短语辨析。put out伸出，生产；figure out弄明白；carry out贯彻，执行；send out发出，长出。答语句意：但我琢磨不透他为什么要辞掉工作。10．（1）计算：$\sqrt{9}$-（π-3.14）0+2-1；（2）化简：（a+3）2-a（a+3）．