题目

 My father _______ to Shanghai. He _______ for over 2 months. A. has been, has left               B. has gone, has gone  C. has gone, has been away         D. has been, has gone 答案：C日常生活中发生的下列变化，都属于物理变化的一组是（　　） A、海水晒盐、汽油挥发B、玻璃棒打碎、米饭变馊C、菜刀生锈、金刚石加工成钻石D、甘蔗榨汁、火药爆炸