有了呼吸道对空气的处理，人体就能完全避免空气中有害物质的危害．（判断对错）．

   A lift is wonderful. It is really only a small room. Rooms usually stay in one place. Lifts travel up and down all day long.
    Sometimes a worker stands in the lift. He or she operates it up and down. In modern lifts there is no worker.  People walk in. They know which floor they want. They push a button and the lift goes to that floor. It is all very fast and easy.
   Lifts are very important to us. Why? Think about a tall building. Maybe it has twenty floors. Maybe it has fifty or more. Who can walk up all the stairs? Maybe people can climb them one time. Can someone climb thirty floors to an office every day? Can small children walk up to their room on the twenty-fourth floor? Can their mothers and fathers carry food up all those stairs? Of course not.
   We can have high buildings because we have lifts. We could not have all the beautiful tall buildings in the world without lifts. They are really wonderful.

    Many Tuesday mornings I have coffee with my father. Although my father is a man of few words, I really 1 the time along with him.

    One recent Tuesday, I found it a bit 2 when I rang the doorbell, no one seemed to be home. I climbed in through the window, noticing the lights that shone from the kitchen, and 3 that my dad must be there, but he wasn't. I 4 through his home, checking every room. I tried not to 5. Yet, upstairs, downstairs, no Dad anywhere.

    I was worried.6, my father was seventy-one years old. Anything could have happened to him. Then, I got in my car and drove to my mother's aerobics（有氧运动）class.

    On the drive, I thought a lot about my father and our 7 together. Suddenly, I was three years old and he was 8 me up to the living room window to see the Christmas lights. In his 9, I was safe and secure. At age ten, he used to wake me up with warm breakfast in bed. Then I was twelve and my dad was 10 all the kids at my birthday party with his magic tricks. I was so 11 of my father for being so 12and talented. He'd made my party a 13.

    As I entered my mother's class. I was nervous. My mom looked at me in 14.

    “Mom, where's Dad?” I asked, “He's working in the 15 on the side of the house!” she answered.

    And I hurried to my car and 16 back to the yard. “Hey, Dad!” I yelled out and told him about my fears of the last half hour. My dad 17 laughing his typical laugh that was always 18. I was so thankful that I still had my daddy. And so , as I 19 the door to my father's house, we went inside for our usual cup of coffee.

    Thanks, Daddy, for all the 20 and more importantly, for all your love.

材料一  确切地说在大萧条爆发前，农业就处于慢性危机之中。1929年，农业人口收入只有273美元，而全国人均收入为750美元，农业收入在国民收入中的比重由1919年的16%下降到10年后的8．8%。．．．．．．除黑人劳工外，没有人比农场主在大危机中遭受的打击更大。农场主在1932年实现的净收入比1929年少了1/3；农产品的价格跌落了50%。

二十世纪早期，政治上提倡小政府、经济上主张自由主义、意识形态上反对极权政治的传统保守主义盛行，．．．．．．把农业放到了与工业同等竞争的位置，把粮食生产当成是农场主、农民个人的事，而把农业的特殊性、尤其是美国农业的特殊性置于不顾，政府的措施收效甚微。到大萧条时期，农业问题雪上加霜，农民的不满情绪越来越严重。

材料二  1933年5月12日，美国国会通过了第一部《农业调整法》。该法案采取的主要策略是“限额耕种”，农户自愿与政府签订市场协议，凡是根据政府“按户分配耕地面积计划”，“自愿”减少耕地、限制产量的农户都可以得到政府的津贴。当时实行《农业调整法》时，也引起了美国民众的强烈抗议，那些正在债务中挣扎的农场主们也不明白为何要控制种植，他们对农业调整议案也抱有戒心。1936年1月6日，联邦最高法院在一起案件中宣布《农业调整法》违反了美国宪法第10条修正案，终止实施该法。

材料三  1936年2月29日在国会通过《土壤保持和作物调配法》，该法以保护土壤的名义，即通过给土地休耕的农场主休耕补贴，换得他们放弃种植，削减粮食生产。同时，已经受到侵蚀的土地则停止耕种，并转租给国家，由政府拔专款支付租金。

材料四  1938年罗斯福签署了新的《农业调整法》。新的法案除了继续实施耕地面积削减计划、控制农业产量外，还建立了农产品常平仓，该法规定由新成立的商品信贷公司以略低于1909～1914年“平价”的价格标准向农民贷款，如果农产品价格下跌低于政府定价，则农户可将剩余产品交商品信贷公司，由公司负担差价。如果市场价高于政府定价，则农民可以在市场出售剩余农产品以归还政府贷款。