题目

在空白处填入一个恰当的词，或填入括号中所给单词的正确形式。 Tom is the son of a farm owner. One New Year's Day, when he was 15, his father asked him (work) on the farm for one year when he was free. Tom was unhappy with his (father) idea. That isn't my job. I have too schoolwork to do. Hearing this, his father said, I promise to give you the best present you can finish one year's work. Tom thought for a while and agreed. Starting one Saturday, boy got up early and worked hard until evening, just like any other farmer. Time (pass) quickly. Tom's crops grew well. t跳伞运动员做低空跳伞表演，当飞机离地面某一高度静止于空中时，运动员离开飞机自由下落，运动一段时间后打开降落伞，展伞后运动员以5m/s2的加速度匀减速下降.则在运动员减速下降的任一秒内（ ）A.这一秒末的速度比前一秒末的速度小5m/sB.这一秒末的速度是前一秒末的速度的0.2倍C.这一秒末的速度比前一秒初的速度小5m/sD.这一秒末的速度比前一秒初的速度小10m/s