One night last February, a seventeen-year-old Duffy drove home along a winding road, he saw a strange light thrown against the tree. “I knew it wasn't the moon”, he said. “I drive this road all ____time and I notice little things out of place.”

    Duffy stopped his car and got out ____(examine). Below him far down in the deep valley lay a broken car with its headlights on. Thirty minutes earlier, a man had driven off the edge of the road, which has no guardrail(护栏). His car fell and rolled end over end, ____(land) on its top more than two hundred feet below.

    Duffy rushed to call for help, then returned and got down to reach the driver ____was badly injured. Snow covered the valley ____the temperature was below freezing. After struggling back up the cliff, Duffy took off his jacket and shirt and wrapped the man in time, along ____ the blankets from his car.

    Life-saving ____(deed) are starting to become usual action for Duffy, the oldest of seven children. When he was 12, he saved his ten-year-old brother from drowning. Two years ago, his three-year-old sister ____(eat) rat poison, and Duffy ____(instant) cleaned out her mouth, make her drink milk to protect her stomach and called doctors.

    “We personal belief is that it is____(meaning) for us to teach the children good values, and it looks like we have got some reward for it.” his father says.

文言文阅读。
                                                                                 送东阳马生序（节选）
      余幼时即嗜学。家贫，无从致书以观，每假借于藏书之家，手自笔录，计日以还。天大寒，砚冰坚，手指不可屈伸，弗之怠。录毕，走送之，不敢稍逾约。以是人多以书假余^①，余因得遍观群书。既加冠，益慕圣贤之道，又患无砚师、名人与游，尝趋百里外，从乡之先达执经叩问。先达德隆望尊，门人弟子填其室，未尝稍降辞色。余立侍左右，援疑质理，俯身倾耳以请；或遇其叱咄，色愈恭，礼愈至，不敢出一言以复；俟其欣悦，则又请焉。故余虽愚，卒获有所闻。
      当余之从师也，负箧曳屣，行深山巨谷中，穷冬烈风，大雪深数尺，足肤皲裂而不知。至舍，四肢僵劲不能动，媵人持汤沃灌，以衾拥覆，久而乃和。寓逆旅主人，日再食，无鲜肥滋味之享。同舍生皆被绮绣，戴珠缨宝饰之帽，腰白玉之环，左佩刀，右备容臭，煜然若神人；余则缊袍敝衣处其间，略无慕艳意。以中有足乐者，不知口体之奉不若人也。盖余之勤且艰若此^②。

治理黄河的关键是：（  ）