题目

At first Bob was puzzled by Virginia s waving, but then it _____ his mind that she was trying to tell him something. A. crossed    B. passed    C. occurred    D. opened 答案：A 解析: cross （enter）one's mind 想起：1）A sudden thought crossed my mind. 2）It never crossed my mind that he might refuse the request. （我从来没有想到他可能会拒绝这个请求。）如用pass through, 例如：When Jane did not come home by midnight, many terrible fears passed through Mother's mind. （=Mother thought of many things that might have happened to Jane.） o向月球发射激光，经2.7s后接收到月球表面反射回来的激光，则月球和地球之间的距离为（激光在空间传播速度C=3×105km/s）A、8.1×105km B、4.05×105km C、3×108km D、3×105km