As a boy I dreamed of flying airplanes. 21 I told Dad I wanted to be a pilot, he said, "You need to do your job well on the farm first, and 22 you may realize your dream." The farm was an everyday responsibility（职责）－that 23 Saturday, Sunday and Christmas too. Every morning I got up at four o' clock to milk and 24 the cows. After the milk was bottled, my older brothers and I 25 it to people' s homes. I was paid five cents a bottle. At that time I 26 that to be successful you have to take care of your responsibilities.
When I was 16, I signed up for flying lessons. To pay for the lessons I 27 a small restaurant with some friends. One of our regular 28 was the president of the Farmers Bank. Every 29 I got, l talked to him about my dream. One day I told him I 30 $3, 500 to buy my own 31 . He lent me the money so that I could fly people within 150 miles of the airport.
Twelve years later I was flying people around the world 32 a pilot of a big airline company. After ten years in the company I started my own 33 .
Today I run a billion-dollar company, but it was on the farm that I learned the principles（原则）that have 34 me. Hard work and determination do 35 dreams come true.
____.
固定用法题。刻苦工作和决心真的能使梦想成真。make sth. come true意为“使……成真”，为固定用法。故选D。
把10gMgCl2和MgSO4的混合物溶于适量水中，滴加2mol／L的BaCl2溶液至沉淀完全，共消耗BaCl2溶液25mL。求混合物中MgCl2和MgSO4的质量各是多少克
固定在匀强磁场中的正方形导线框abcd，各边长为1．其中ab是一段电阻为R的均匀电阻丝，其余3边均为电阻可忽略的铜线。磁场的磁感应强度为B，方向垂直纸面向里。现有一与ab段的材料、粗细、长度都相同的电阻丝PQ架在导体框上，如图所示。PQ以恒定速度方向如何
一小物块以速度v0=10m／s沿光滑地面滑行，然后沿光滑曲面上升到顶部水平的高台上，并由高台上飞出，如图所示。问当高台的高度h多大时，小物块飞行的水平距离最大这个距离是多少(g=10m／s2)
某晶体盐的水溶液呈浅绿色，在此溶液中通入氯气，溶液变为棕黄色，把所得棕黄色溶液分成两份：一份加入KSCN溶液，溶液变深红色；另一份加入BaCl2溶液，产生不溶于稀HNO3的白色沉淀，则该晶体盐的化学式是_______。
欲除去乙烷中的乙烯，可将混合气体通过盛有_______的洗气瓶；欲除去乙炔中的硫化氢，可将混合气体通过盛有_______的洗气瓶。
浓硝酸常盛装在棕色瓶中，且贮放在冷暗处，原因是_______，
碳酸氢钠溶液和烧碱溶液反应的离子方程式为_______。
常温下，氨水中存在的离子有_______。
在酸或碱存在的条件下，甲酸甲酯跟水发生水解反应的化学方程式为_______。
有下列几种气体：H2、O2、HCl、NO、NH3、CH4，其中通常情况下能用来和水做“喷泉”实验的是_______。
