One morning, I was waiting at the bus stop, worried about ____(be) late for school. There were many people waiting at the bus stop, ____ some of them looked ____(disappoint). When the bus finally came, we all hurried on board. I got a place next ____ the window, so I had a good view of the sidewalk. A boy on a bike ____(catch) my attention. He was riding beside the bus and waving his arms. I heard a passenger behind me shouting to the driver, but he refused ____(stop) until we reached the next stop. Still, the boy kept ____(ride). He was carrying something over his shoulder and shouting. Finally, when we came to the next stop, the boy ran up to the door of the bus. I heard an excited conversation. Then the driver stood up and asked, “____ anyone lose a suitcase at the last stop?” A woman on the bus shouted. “Oh dear! It's ____(I).” She pushed her way to the driver and took the suitcase thankfully. Everyone on the bus began talking about what the boy had done, and the crowed of strangers ____(sudden) became friendly to one another.

如图所示，电源内阻r=1Ω，R₁=2Ω，R₂=6Ω，灯L上标有“3V、1.5W”的字样，当滑动变阻器R₃的滑片P移到最右端时，电流表示数为1A，灯L恰能正常发光．

① 《战争与和平》②《复活》

② 《向日葵》④《英雄交响曲》

按课文《奇怪的大石头》填空，体会意思。

这么重的大石头从天上掉下来，力量____。它应该____。可它____?

他终于弄明白了，这块大石头是从____被____带到这里来的。经过进一步的考察，他发现在____有大量的____活动的遗迹。他的这一研究成果，震惊了____。