________________，是实现人生价值的重要途径。
从日常生活的点滴小事做起
下列现象中不属于光的直线传播的是（ ）
A．小孔成像
B．穿过森林的太阳光
C．海市蜃楼
D．手影游戏
In the last few years, great changes _____ in China.[ ]
A. were happened
B. have been happened
C. have happened
